31231122003013 has 4 divisors (see below), whose sum is σ = 31248367240608. Its totient is φ = 31213876765420.

The previous prime is 31231122002887. The next prime is 31231122003079. The reversal of 31231122003013 is 31030022113213.

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 a cyclic number.

It is not a de Polignac number, because 31231122003013 - 2⁹ = 31231122002501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231122003083) 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, 8622616081 + ... + 8622619702.

It is an arithmetic number, because the mean of its divisors is an integer number (7812091810152).

Almost surely, 2^{31231122003013} is an apocalyptic number.

It is an amenable number.

31231122003013 is a deficient number, since it is larger than the sum of its proper divisors (17245237595).

31231122003013 is a wasteful number, since it uses less digits than its factorization.

31231122003013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17245237594.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31231122003013 its reverse (31030022113213), we get a palindrome (62261144116226).

The spelling of 31231122003013 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-two million, three thousand, thirteen".