21311200313212 has 12 divisors (see below), whose sum is σ = 39257474261320. Its totient is φ = 10094779095696.

The previous prime is 21311200313177. The next prime is 21311200313233. The reversal of 21311200313212 is 21231300211312.

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, 140205265143 + ... + 140205265294.

Almost surely, 2^{21311200313212} is an apocalyptic number.

It is an amenable number.

21311200313212 is a deficient number, since it is larger than the sum of its proper divisors (17946273948108).

21311200313212 is a wasteful number, since it uses less digits than its factorization.

21311200313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280410530460 (or 280410530458 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21311200313212 its reverse (21231300211312), we get a palindrome (42542500524524).

The spelling of 21311200313212 in words is "twenty-one trillion, three hundred eleven billion, two hundred million, three hundred thirteen thousand, two hundred twelve".