21311333320012 has 12 divisors (see below), whose sum is σ = 37323588009400. Its totient is φ = 10647451031616.

The previous prime is 21311333319893. The next prime is 21311333320129. The reversal of 21311333320012 is 21002333311312.

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, 2053901262 + ... + 2053911637.

Almost surely, 2^{21311333320012} is an apocalyptic number.

It is an amenable number.

21311333320012 is a deficient number, since it is larger than the sum of its proper divisors (16012254689388).

21311333320012 is a wasteful number, since it uses less digits than its factorization.

21311333320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107814200 (or 4107814198 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21311333320012 its reverse (21002333311312), we get a palindrome (42313666631324).

The spelling of 21311333320012 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirty-three million, three hundred twenty thousand, twelve".