31312210222112 has 12 divisors (see below), whose sum is σ = 61645913874846. Its totient is φ = 15656105111040.

The previous prime is 31312210222109. The next prime is 31312210222123. The reversal of 31312210222112 is 21122201221313.

It can be written as a sum of positive squares in only one way, i.e., 30249076007056 + 1063134215056 = 5499916^2 + 1031084^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489253284689 + ... + 489253284752.

Almost surely, 2^{31312210222112} is an apocalyptic number.

31312210222112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31312210222112 is a deficient number, since it is larger than the sum of its proper divisors (30333703652734).

31312210222112 is an equidigital number, since it uses as much as digits as its factorization.

31312210222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978506569451 (or 978506569443 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31312210222112 its reverse (21122201221313), we get a palindrome (52434411443425).

The spelling of 31312210222112 in words is "thirty-one trillion, three hundred twelve billion, two hundred ten million, two hundred twenty-two thousand, one hundred twelve".