31331212001321 has 8 divisors (see below), whose sum is σ = 31998248294400. Its totient is φ = 30664192990048.

The previous prime is 31331212001263. The next prime is 31331212001333. The reversal of 31331212001321 is 12310021213313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31331212001321 - 2²⁶ = 31331144892457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31333212001321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622601 + ... + 7940406.

It is an arithmetic number, because the mean of its divisors is an integer number (3999781036800).

Almost surely, 2^{31331212001321} is an apocalyptic number.

It is an amenable number.

31331212001321 is a deficient number, since it is larger than the sum of its proper divisors (667036293079).

31331212001321 is an equidigital number, since it uses as much as digits as its factorization.

31331212001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8640903.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31331212001321 its reverse (12310021213313), we get a palindrome (43641233214634).

The spelling of 31331212001321 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred twelve million, one thousand, three hundred twenty-one".