21122220112110 has 48 divisors (see below), whose sum is σ = 59142216317184. Its totient is φ = 5199315719616.

The previous prime is 21122220112109. The next prime is 21122220112127. The reversal of 21122220112110 is 1121102222112.

21122220112110 is a `hidden beast` number, since 211 + 22 + 220 + 1 + 1 + 211 + 0 = 666.

It is a super-2 number, since 2×21122220112110² (a number of 27 digits) contains 22 as substring.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9026588622 + ... + 9026590961.

It is an arithmetic number, because the mean of its divisors is an integer number (1232129506608).

Almost surely, 2^{21122220112110} is an apocalyptic number.

21122220112110 is an abundant number, since it is smaller than the sum of its proper divisors (38019996205074).

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

21122220112110 is a wasteful number, since it uses less digits than its factorization.

21122220112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18053179609 (or 18053179606 counting only the distinct ones).

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

Adding to 21122220112110 its reverse (1121102222112), we get a palindrome (22243322334222).

The spelling of 21122220112110 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, one hundred twelve thousand, one hundred ten".