21220122112110 has 24 divisors (see below), whose sum is σ = 55172317491720. Its totient is φ = 5658699229872.

The previous prime is 21220122112069. The next prime is 21220122112157. The reversal of 21220122112110 is 1121122102212.

21220122112110 is a `hidden beast` number, since 21 + 220 + 1 + 2 + 211 + 211 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117889567200 + ... + 117889567379.

It is an arithmetic number, because the mean of its divisors is an integer number (2298846562155).

Almost surely, 2^{21220122112110} is an apocalyptic number.

21220122112110 is an abundant number, since it is smaller than the sum of its proper divisors (33952195379610).

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

21220122112110 is a wasteful number, since it uses less digits than its factorization.

21220122112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235779134592 (or 235779134589 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21220122112110 its reverse (1121122102212), we get a palindrome (22341244214322).

The spelling of 21220122112110 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred twelve thousand, one hundred ten".