21011122122102 has 64 divisors (see below), whose sum is σ = 54663081984000. Its totient is φ = 5856758775360.

The previous prime is 21011122122077. The next prime is 21011122122119. The reversal of 21011122122102 is 20122122111012.

21011122122102 is a `hidden beast` number, since 210 + 1 + 11 + 221 + 221 + 0 + 2 = 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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677850102 + ... + 677881097.

It is an arithmetic number, because the mean of its divisors is an integer number (854110656000).

Almost surely, 2^{21011122122102} is an apocalyptic number.

21011122122102 is an abundant number, since it is smaller than the sum of its proper divisors (33651959861898).

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

21011122122102 is a wasteful number, since it uses less digits than its factorization.

21011122122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355731258 (or 1355731252 counting only the distinct ones).

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

Adding to 21011122122102 its reverse (20122122111012), we get a palindrome (41133244233114).

The spelling of 21011122122102 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred two".