21121120102112 has 48 divisors (see below), whose sum is σ = 45052129351152. Its totient is φ = 9708202936320.

The previous prime is 21121120102087. The next prime is 21121120102151. The reversal of 21121120102112 is 21120102112112.

It is a super-2 number, since 2×21121120102112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451436939 + ... + 451483722.

It is an arithmetic number, because the mean of its divisors is an integer number (938586028149).

Almost surely, 2^{21121120102112} is an apocalyptic number.

It is an amenable number.

21121120102112 is an abundant number, since it is smaller than the sum of its proper divisors (23931009249040).

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

21121120102112 is a wasteful number, since it uses less digits than its factorization.

21121120102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902920731 (or 902920723 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21121120102112 its reverse (21120102112112), we get a palindrome (42241222214224).

The spelling of 21121120102112 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred two thousand, one hundred twelve".