21202020102112 has 48 divisors (see below), whose sum is σ = 43954752522240. Its totient is φ = 10039323731328.

The previous prime is 21202020102091. The next prime is 21202020102143. The reversal of 21202020102112 is 21120102020212.

It is a happy number.

It is a super-2 number, since 2×21202020102112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 4855278 + ... + 8122669.

It is an arithmetic number, because the mean of its divisors is an integer number (915724010880).

Almost surely, 2^{21202020102112} is an apocalyptic number.

It is an amenable number.

21202020102112 is an abundant number, since it is smaller than the sum of its proper divisors (22752732420128).

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

21202020102112 is a wasteful number, since it uses less digits than its factorization.

21202020102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980663 (or 12980655 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202020102112 its reverse (21120102020212), we get a palindrome (42322122122324).

The spelling of 21202020102112 in words is "twenty-one trillion, two hundred two billion, twenty million, one hundred two thousand, one hundred twelve".