31231301210013 has 4 divisors (see below), whose sum is σ = 41641734946688. Its totient is φ = 20820867473340.

The previous prime is 31231301209973. The next prime is 31231301210017. The reversal of 31231301210013 is 31001210313213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31231301210013 - 2¹² = 31231301205917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231301210017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5205216868333 + ... + 5205216868338.

It is an arithmetic number, because the mean of its divisors is an integer number (10410433736672).

Almost surely, 2^{31231301210013} is an apocalyptic number.

It is an amenable number.

31231301210013 is a deficient number, since it is larger than the sum of its proper divisors (10410433736675).

31231301210013 is a wasteful number, since it uses less digits than its factorization.

31231301210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410433736674.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31231301210013 its reverse (31001210313213), we get a palindrome (62232511523226).

The spelling of 31231301210013 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred one million, two hundred ten thousand, thirteen".