31111112202312 has 64 divisors (see below), whose sum is σ = 79438204753920. Its totient is φ = 10149011823168.

The previous prime is 31111112202311. The next prime is 31111112202319. The reversal of 31111112202312 is 21320221111113.

It is a super-4 number, since 4×31111112202312⁴ (a number of 55 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (31111112202311) 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, 15222213 + ... + 17144619.

It is an arithmetic number, because the mean of its divisors is an integer number (1241221949280).

Almost surely, 2^{31111112202312} is an apocalyptic number.

It is an amenable number.

31111112202312 is an abundant number, since it is smaller than the sum of its proper divisors (48327092551608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111112202312 is a wasteful number, since it uses less digits than its factorization.

31111112202312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936810 (or 1936806 counting only the distinct ones).

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

Adding to 31111112202312 its reverse (21320221111113), we get a palindrome (52431333313425).

The spelling of 31111112202312 in words is "thirty-one trillion, one hundred eleven billion, one hundred twelve million, two hundred two thousand, three hundred twelve".