31312121030 has 32 divisors (see below), whose sum is σ = 60213749760. Its totient is φ = 11688541920.

The previous prime is 31312121021. The next prime is 31312121033. The reversal of 31312121030 is 3012121313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312121033) 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, 1217126 + ... + 1242585.

It is an arithmetic number, because the mean of its divisors is an integer number (1881679680).

Almost surely, 2^31312121030 is an apocalyptic number.

31312121030 is a deficient number, since it is larger than the sum of its proper divisors (28901628730).

31312121030 is a wasteful number, since it uses less digits than its factorization.

31312121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459804.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31312121030 its reverse (3012121313), we get a palindrome (34324242343).

The spelling of 31312121030 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-one thousand, thirty".