211220211021100 has 72 divisors (see below), whose sum is σ = 478279407221280. Its totient is φ = 80814118049280.

The previous prime is 211220211021059. The next prime is 211220211021139. The reversal of 211220211021100 is 1120112022112.

It is a super-2 number, since 2×211220211021100² (a number of 29 digits) contains 22 as substring.

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, 478614144 + ... + 479055256.

It is an arithmetic number, because the mean of its divisors is an integer number (6642769544740).

Almost surely, 2^{211220211021100} is an apocalyptic number.

211220211021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220211021100 is an abundant number, since it is smaller than the sum of its proper divisors (267059196200180).

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

211220211021100 is a wasteful number, since it uses less digits than its factorization.

211220211021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649339 (or 649332 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211220211021100 its reverse (1120112022112), we get a palindrome (212340323043212).

The spelling of 211220211021100 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred eleven million, twenty-one thousand, one hundred".