211220020121022 has 128 divisors (see below), whose sum is σ = 528623425290240. Its totient is φ = 61934652108000.

The previous prime is 211220020120987. The next prime is 211220020121051. The reversal of 211220020121022 is 220121020022112.

It is a happy number.

211220020121022 is a `hidden beast` number, since 2 + 11 + 220 + 0 + 201 + 210 + 22 = 666.

211220020121022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211220020121022² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211220020120986 and 211220020121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 170836783 + ... + 172068725.

It is an arithmetic number, because the mean of its divisors is an integer number (4129870510080).

Almost surely, 2^{211220020121022} is an apocalyptic number.

211220020121022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 211220020121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264311712645120).

211220020121022 is an abundant number, since it is smaller than the sum of its proper divisors (317403405169218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211220020121022 is a wasteful number, since it uses less digits than its factorization.

211220020121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241307 (or 1241301 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211220020121022 its reverse (220121020022112), we get a palindrome (431341040143134).

It can be divided in two parts, 2112200 and 20121022, that added together give a palindrome (22233222).

The spelling of 211220020121022 in words is "two hundred eleven trillion, two hundred twenty billion, twenty million, one hundred twenty-one thousand, twenty-two".