21102011122122 has 32 divisors (see below), whose sum is σ = 53592409200000. Its totient is φ = 6029146034784.

The previous prime is 21102011122111. The next prime is 21102011122177. The reversal of 21102011122122 is 22122111020112.

21102011122122 is a `hidden beast` number, since 211 + 0 + 201 + 11 + 221 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21102011122095 and 21102011122104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27912712747 + ... + 27912713502.

It is an arithmetic number, because the mean of its divisors is an integer number (1674762787500).

Almost surely, 2^{21102011122122} is an apocalyptic number.

21102011122122 is an abundant number, since it is smaller than the sum of its proper divisors (32490398077878).

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

21102011122122 is a wasteful number, since it uses less digits than its factorization.

21102011122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55825426267 (or 55825426261 counting only the distinct ones).

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

Adding to 21102011122122 its reverse (22122111020112), we get a palindrome (43224122142234).

It can be divided in two parts, 2110201 and 1122122, that added together give a palindrome (3232323).

The spelling of 21102011122122 in words is "twenty-one trillion, one hundred two billion, eleven million, one hundred twenty-two thousand, one hundred twenty-two".