21010313312 has 24 divisors (see below), whose sum is σ = 41743548000. Its totient is φ = 10408777344.

The previous prime is 21010313281. The next prime is 21010313369. The reversal of 21010313312 is 21331301012.

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, 3008312 + ... + 3015287.

It is an arithmetic number, because the mean of its divisors is an integer number (1739314500).

Almost surely, 2^21010313312 is an apocalyptic number.

It is an amenable number.

21010313312 is a deficient number, since it is larger than the sum of its proper divisors (20733234688).

21010313312 is a wasteful number, since it uses less digits than its factorization.

21010313312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023718 (or 6023710 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21010313312 its reverse (21331301012), we get a palindrome (42341614324).

The spelling of 21010313312 in words is "twenty-one billion, ten million, three hundred thirteen thousand, three hundred twelve".