31312222121120 has 96 divisors (see below), whose sum is σ = 76823760560400. Its totient is φ = 12045941211136.

The previous prime is 31312222121111. The next prime is 31312222121129. The reversal of 31312222121120 is 2112122221313.

It is an interprime number because it is at equal distance from previous prime (31312222121111) and next prime (31312222121129).

It can be written as a sum of positive squares in 8 ways, for example, as 28987585216144 + 2324636904976 = 5384012^2 + 1524676^2 .

It is not an unprimeable number, because it can be changed into a prime (31312222121129) 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, 11936555 + ... + 14321514.

Almost surely, 2^{31312222121120} is an apocalyptic number.

It is an amenable number.

31312222121120 is an abundant number, since it is smaller than the sum of its proper divisors (45511538439280).

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

31312222121120 is a wasteful number, since it uses less digits than its factorization.

31312222121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26258370 (or 26258362 counting only the distinct ones).

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

Adding to 31312222121120 its reverse (2112122221313), we get a palindrome (33424344342433).

The spelling of 31312222121120 in words is "thirty-one trillion, three hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty".