21013033012 has 12 divisors (see below), whose sum is σ = 36774089856. Its totient is φ = 10506150200.

The previous prime is 21013032979. The next prime is 21013033021. The reversal of 21013033012 is 21033031012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68637 + ... + 216187.

It is an arithmetic number, because the mean of its divisors is an integer number (3064507488).

Almost surely, 2^21013033012 is an apocalyptic number.

It is an amenable number.

21013033012 is a deficient number, since it is larger than the sum of its proper divisors (15761056844).

21013033012 is a wasteful number, since it uses less digits than its factorization.

21013033012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183158 (or 183156 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21013033012 its reverse (21033031012), we get a palindrome (42046064024).

The spelling of 21013033012 in words is "twenty-one billion, thirteen million, thirty-three thousand, twelve".