21130310312 has 16 divisors (see below), whose sum is σ = 41341911840. Its totient is φ = 10105800496.

The previous prime is 21130310263. The next prime is 21130310321. The reversal of 21130310312 is 21301303112.

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, 57419138 + ... + 57419505.

It is an arithmetic number, because the mean of its divisors is an integer number (2583869490).

Almost surely, 2^21130310312 is an apocalyptic number.

It is an amenable number.

21130310312 is a deficient number, since it is larger than the sum of its proper divisors (20211601528).

21130310312 is a wasteful number, since it uses less digits than its factorization.

21130310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114838672 (or 114838668 counting only the distinct ones).

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

Adding to 21130310312 its reverse (21301303112), we get a palindrome (42431613424).

The spelling of 21130310312 in words is "twenty-one billion, one hundred thirty million, three hundred ten thousand, three hundred twelve".