211222220101020 has 72 divisors (see below), whose sum is σ = 640849184233440. Its totient is φ = 56313460897920.

The previous prime is 211222220101019. The next prime is 211222220101037. The reversal of 211222220101020 is 20101022222112.

It is a happy number.

211222220101020 is a `hidden beast` number, since 211 + 2 + 222 + 201 + 0 + 10 + 20 = 666.

It is a super-2 number, since 2×211222220101020² (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 = 211222220100984 and 211222220101002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129022471 + ... + 130649310.

Almost surely, 2^{211222220101020} is an apocalyptic number.

211222220101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222220101020 is an abundant number, since it is smaller than the sum of its proper divisors (429626964132420).

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

211222220101020 is a wasteful number, since it uses less digits than its factorization.

211222220101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259676315 (or 259676310 counting only the distinct ones).

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

Adding to 211222220101020 its reverse (20101022222112), we get a palindrome (231323242323132).

The spelling of 211222220101020 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty million, one hundred one thousand, twenty".