21033110312 has 8 divisors (see below), whose sum is σ = 39437081850. Its totient is φ = 10516555152.

The previous prime is 21033110297. The next prime is 21033110323. The reversal of 21033110312 is 21301133012.

It can be written as a sum of positive squares in only one way, i.e., 19106427076 + 1926683236 = 138226^2 + 43894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314569387 + ... + 1314569402.

Almost surely, 2^21033110312 is an apocalyptic number.

It is an amenable number.

21033110312 is a deficient number, since it is larger than the sum of its proper divisors (18403971538).

21033110312 is a wasteful number, since it uses less digits than its factorization.

21033110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629138795 (or 2629138791 counting only the distinct ones).

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

Adding to 21033110312 its reverse (21301133012), we get a palindrome (42334243324).

The spelling of 21033110312 in words is "twenty-one billion, thirty-three million, one hundred ten thousand, three hundred twelve".