31312213223111 has 6 divisors (see below), whose sum is σ = 33046961878512. Its totient is φ = 29664202000500.

The previous prime is 31312213223077. The next prime is 31312213223167. The reversal of 31312213223111 is 11132231221313.

It is not a de Polignac number, because 31312213223111 - 2¹⁴ = 31312213206727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312213223611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43368716015 + ... + 43368716736.

It is an arithmetic number, because the mean of its divisors is an integer number (5507826979752).

Almost surely, 2^{31312213223111} is an apocalyptic number.

31312213223111 is a deficient number, since it is larger than the sum of its proper divisors (1734748655401).

31312213223111 is an equidigital number, since it uses as much as digits as its factorization.

31312213223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86737432789 (or 86737432770 counting only the distinct ones).

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

Adding to 31312213223111 its reverse (11132231221313), we get a palindrome (42444444444424).

The spelling of 31312213223111 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred eleven".