31232120212313 has 12 divisors (see below), whose sum is σ = 31527439968528. Its totient is φ = 30939541688880.

The previous prime is 31232120212309. The next prime is 31232120212399. The reversal of 31232120212313 is 31321202123213.

It is not a de Polignac number, because 31232120212313 - 2² = 31232120212309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31232120212913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61182470 + ... + 61690832.

It is an arithmetic number, because the mean of its divisors is an integer number (2627286664044).

Almost surely, 2^{31232120212313} is an apocalyptic number.

It is an amenable number.

31232120212313 is a deficient number, since it is larger than the sum of its proper divisors (295319756215).

31232120212313 is an equidigital number, since it uses as much as digits as its factorization.

31232120212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513752 (or 513643 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31232120212313 its reverse (31321202123213), we get a palindrome (62553322335526).

The spelling of 31232120212313 in words is "thirty-one trillion, two hundred thirty-two billion, one hundred twenty million, two hundred twelve thousand, three hundred thirteen".