31312031120211 has 16 divisors (see below), whose sum is σ = 41756407066368. Its totient is φ = 20871171602400.

The previous prime is 31312031120171. The next prime is 31312031120257. The reversal of 31312031120211 is 11202113021313.

It is not a de Polignac number, because 31312031120211 - 2²¹ = 31312029023059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312031120311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808847146 + ... + 808885856.

It is an arithmetic number, because the mean of its divisors is an integer number (2609775441648).

Almost surely, 2^{31312031120211} is an apocalyptic number.

31312031120211 is a deficient number, since it is larger than the sum of its proper divisors (10444375946157).

31312031120211 is a wasteful number, since it uses less digits than its factorization.

31312031120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77162.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31312031120211 its reverse (11202113021313), we get a palindrome (42514144141524).

The spelling of 31312031120211 in words is "thirty-one trillion, three hundred twelve billion, thirty-one million, one hundred twenty thousand, two hundred eleven".