21013300312 has 32 divisors (see below), whose sum is σ = 40289296320. Its totient is φ = 10270055680.

The previous prime is 21013300271. The next prime is 21013300333. The reversal of 21013300312 is 21300331012.

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, 264612 + ... + 334732.

It is an arithmetic number, because the mean of its divisors is an integer number (1259040510).

Almost surely, 2^21013300312 is an apocalyptic number.

It is an amenable number.

21013300312 is a deficient number, since it is larger than the sum of its proper divisors (19275996008).

21013300312 is a wasteful number, since it uses less digits than its factorization.

21013300312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70971 (or 70967 counting only the distinct ones).

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

Adding to 21013300312 its reverse (21300331012), we get a palindrome (42313631324).

The spelling of 21013300312 in words is "twenty-one billion, thirteen million, three hundred thousand, three hundred twelve".