31312213312211 has 16 divisors (see below), whose sum is σ = 33891158112000. Its totient is φ = 28757606331168.

The previous prime is 31312213312181. The next prime is 31312213312241. The reversal of 31312213312211 is 11221331221313.

It is an interprime number because it is at equal distance from previous prime (31312213312181) and next prime (31312213312241).

It is not a de Polignac number, because 31312213312211 - 2¹⁸ = 31312213050067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312213312241) 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, 119665520 + ... + 119926898.

It is an arithmetic number, because the mean of its divisors is an integer number (2118197382000).

Almost surely, 2^{31312213312211} is an apocalyptic number.

31312213312211 is a deficient number, since it is larger than the sum of its proper divisors (2578944799789).

31312213312211 is a wasteful number, since it uses less digits than its factorization.

31312213312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307898.

The product of its digits is 1296, while the sum is 26.

Adding to 31312213312211 its reverse (11221331221313), we get a palindrome (42533544533524).

The spelling of 31312213312211 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred twelve thousand, two hundred eleven".