21122110110123 has 80 divisors (see below), whose sum is σ = 35611630322400. Its totient is φ = 12358649157120.

The previous prime is 21122110110113. The next prime is 21122110110133. The reversal of 21122110110123 is 32101101122112.

It is a happy number.

21122110110123 is a `hidden beast` number, since 211 + 221 + 1 + 0 + 110 + 123 = 666.

It is an interprime number because it is at equal distance from previous prime (21122110110113) and next prime (21122110110133).

It is not a de Polignac number, because 21122110110123 - 2¹⁶ = 21122110044587 is a prime.

It is a super-2 number, since 2×21122110110123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122110110096 and 21122110110105.

It is not an unprimeable number, because it can be changed into a prime (21122110110113) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 311920393 + ... + 311988101.

It is an arithmetic number, because the mean of its divisors is an integer number (445145379030).

Almost surely, 2^{21122110110123} is an apocalyptic number.

21122110110123 is a deficient number, since it is larger than the sum of its proper divisors (14489520212277).

21122110110123 is a wasteful number, since it uses less digits than its factorization.

21122110110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79834 (or 79825 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21122110110123 its reverse (32101101122112), we get a palindrome (53223211232235).

The spelling of 21122110110123 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, one hundred ten thousand, one hundred twenty-three".