31212314011 has 16 divisors (see below), whose sum is σ = 33358917760. Its totient is φ = 29116454400.

The previous prime is 31212313999. The next prime is 31212314027. The reversal of 31212314011 is 11041321213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212314011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212314011.

It is not an unprimeable number, because it can be changed into a prime (31212314311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6109120 + ... + 6114226.

It is an arithmetic number, because the mean of its divisors is an integer number (2084932360).

Almost surely, 2^31212314011 is an apocalyptic number.

31212314011 is a deficient number, since it is larger than the sum of its proper divisors (2146603749).

31212314011 is a wasteful number, since it uses less digits than its factorization.

31212314011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9994.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31212314011 its reverse (11041321213), we get a palindrome (42253635224).

It can be divided in two parts, 3121 and 2314011, that added together give a palindrome (2317132).

The spelling of 31212314011 in words is "thirty-one billion, two hundred twelve million, three hundred fourteen thousand, eleven".