21020102112112 has 40 divisors (see below), whose sum is σ = 41508332582400. Its totient is φ = 10310134044672.

The previous prime is 21020102112103. The next prime is 21020102112133. The reversal of 21020102112112 is 21121120102012.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57934537 + ... + 58296232.

It is an arithmetic number, because the mean of its divisors is an integer number (1037708314560).

Almost surely, 2^{21020102112112} is an apocalyptic number.

It is an amenable number.

21020102112112 is a deficient number, since it is larger than the sum of its proper divisors (20488230470288).

21020102112112 is a wasteful number, since it uses less digits than its factorization.

21020102112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116230993 (or 116230987 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21020102112112 its reverse (21121120102012), we get a palindrome (42141222214124).

The spelling of 21020102112112 in words is "twenty-one trillion, twenty billion, one hundred two million, one hundred twelve thousand, one hundred twelve".