21010113012 has 24 divisors (see below), whose sum is σ = 56026968256. Its totient is φ = 6002889408.

The previous prime is 21010112987. The next prime is 21010113023. The reversal of 21010113012 is 21031101012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125060113 + ... + 125060280.

Almost surely, 2^21010113012 is an apocalyptic number.

It is an amenable number.

21010113012 is an abundant number, since it is smaller than the sum of its proper divisors (35016855244).

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

21010113012 is a wasteful number, since it uses less digits than its factorization.

21010113012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250120407 (or 250120405 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21010113012 its reverse (21031101012), we get a palindrome (42041214024).

The spelling of 21010113012 in words is "twenty-one billion, ten million, one hundred thirteen thousand, twelve".