21010122211100 has 72 divisors (see below), whose sum is σ = 49737860146128. Its totient is φ = 7639864588800.

The previous prime is 21010122211073. The next prime is 21010122211139. The reversal of 21010122211100 is 111222101012.

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, 52045634 + ... + 52447766.

Almost surely, 2^{21010122211100} is an apocalyptic number.

21010122211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010122211100 is an abundant number, since it is smaller than the sum of its proper divisors (28727737935028).

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

21010122211100 is a wasteful number, since it uses less digits than its factorization.

21010122211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449655 (or 449648 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21010122211100 its reverse (111222101012), we get a palindrome (21121344312112).

The spelling of 21010122211100 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, two hundred eleven thousand, one hundred".