31312031011211 has 8 divisors (see below), whose sum is σ = 32960615995200. Its totient is φ = 29663504362440.

The previous prime is 31312031011189. The next prime is 31312031011213. The reversal of 31312031011211 is 11211013021313.

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 31312031011211 - 2²⁶ = 31311963902347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312031011213) 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, 13479881 + ... + 15631098.

It is an arithmetic number, because the mean of its divisors is an integer number (4120076999400).

Almost surely, 2^{31312031011211} is an apocalyptic number.

31312031011211 is a deficient number, since it is larger than the sum of its proper divisors (1648584983989).

31312031011211 is a wasteful number, since it uses less digits than its factorization.

31312031011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29167609.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31312031011211 its reverse (11211013021313), we get a palindrome (42523044032524).

It can be divided in two parts, 3131203 and 1011211, that added together give a palindrome (4142414).

The spelling of 31312031011211 in words is "thirty-one trillion, three hundred twelve billion, thirty-one million, eleven thousand, two hundred eleven".