21231322313212 has 96 divisors (see below), whose sum is σ = 41338447718400. Its totient is φ = 9461041056000.

The previous prime is 21231322313191. The next prime is 21231322313239.

21231322313212 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194801589 + ... + 194910547.

It is an arithmetic number, because the mean of its divisors is an integer number (430608830400).

Almost surely, 2^{21231322313212} is an apocalyptic number.

21231322313212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21231322313212 is a deficient number, since it is larger than the sum of its proper divisors (20107125405188).

21231322313212 is a wasteful number, since it uses less digits than its factorization.

21231322313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109507 (or 109505 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

It can be divided in two parts, 2123132 and 2313212, that added together give a palindrome (4436344).

The spelling of 21231322313212 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred twenty-two million, three hundred thirteen thousand, two hundred twelve".