21033020312 has 32 divisors (see below), whose sum is σ = 41245459200. Its totient is φ = 10036317984.

The previous prime is 21033020303. The next prime is 21033020321. The reversal of 21033020312 is 21302033012.

It is an interprime number because it is at equal distance from previous prime (21033020303) and next prime (21033020321).

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, 49418 + ... + 210969.

It is an arithmetic number, because the mean of its divisors is an integer number (1288920600).

Almost surely, 2^21033020312 is an apocalyptic number.

It is an amenable number.

21033020312 is a deficient number, since it is larger than the sum of its proper divisors (20212438888).

21033020312 is a wasteful number, since it uses less digits than its factorization.

21033020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260855 (or 260851 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21033020312 its reverse (21302033012), we get a palindrome (42335053324).

The spelling of 21033020312 in words is "twenty-one billion, thirty-three million, twenty thousand, three hundred twelve".