31320112212111 has 16 divisors (see below), whose sum is σ = 42300451929600. Its totient is φ = 20610069811968.

The previous prime is 31320112212097. The next prime is 31320112212143. The reversal of 31320112212111 is 11121221102313.

It is not a de Polignac number, because 31320112212111 - 2³⁸ = 31045234305167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320112212511) 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, 17411001 + ... + 19125458.

It is an arithmetic number, because the mean of its divisors is an integer number (2643778245600).

Almost surely, 2^{31320112212111} is an apocalyptic number.

31320112212111 is a deficient number, since it is larger than the sum of its proper divisors (10980339717489).

31320112212111 is a wasteful number, since it uses less digits than its factorization.

31320112212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36540158.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 31320112212111 its reverse (11121221102313), we get a palindrome (42441333314424).

The spelling of 31320112212111 in words is "thirty-one trillion, three hundred twenty billion, one hundred twelve million, two hundred twelve thousand, one hundred eleven".