211221122022 has 24 divisors (see below), whose sum is σ = 467382910176. Its totient is φ = 68909018256.

The previous prime is 211221122009. The next prime is 211221122029. The reversal of 211221122022 is 220221122112.

It is a happy number.

211221122022 is a `hidden beast` number, since 211 + 2 + 211 + 220 + 22 = 666.

211221122022 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 2×211221122022² (a number of 23 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 = 211221121986 and 211221122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124834333 + ... + 124836024.

It is an arithmetic number, because the mean of its divisors is an integer number (19474287924).

Almost surely, 2^211221122022 is an apocalyptic number.

211221122022 is an abundant number, since it is smaller than the sum of its proper divisors (256161788154).

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

211221122022 is a wasteful number, since it uses less digits than its factorization.

211221122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249670412 (or 249670409 counting only the distinct ones).

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

Adding to 211221122022 its reverse (220221122112), we get a palindrome (431442244134).

The spelling of 211221122022 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-two".