31311123211031 has 8 divisors (see below), whose sum is σ = 31977442456320. Its totient is φ = 30644809179768.

The previous prime is 31311123210979. The next prime is 31311123211061. The reversal of 31311123211031 is 13011232111313.

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 31311123211031 - 2¹⁰ = 31311123210007 is a prime.

It is a super-2 number, since 2×31311123211031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311123210988 and 31311123211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311123211061) 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, 12337520 + ... + 14657306.

It is an arithmetic number, because the mean of its divisors is an integer number (3997180307040).

Almost surely, 2^{31311123211031} is an apocalyptic number.

31311123211031 is a deficient number, since it is larger than the sum of its proper divisors (666319245289).

31311123211031 is a wasteful number, since it uses less digits than its factorization.

31311123211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607013.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31311123211031 its reverse (13011232111313), we get a palindrome (44322355322344).

The spelling of 31311123211031 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-three million, two hundred eleven thousand, thirty-one".