31021120031146 has 64 divisors (see below), whose sum is σ = 56570639811840. Its totient is φ = 12454257024000.

The previous prime is 31021120031123. The next prime is 31021120031177. The reversal of 31021120031146 is 64113002112013.

It is a self number, because there is not a number n which added to its sum of digits gives 31021120031146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86620620 + ... + 86978008.

It is an arithmetic number, because the mean of its divisors is an integer number (883916247060).

Almost surely, 2^{31021120031146} is an apocalyptic number.

31021120031146 is a deficient number, since it is larger than the sum of its proper divisors (25549519780694).

31021120031146 is a wasteful number, since it uses less digits than its factorization.

31021120031146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359119.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 31021120031146 its reverse (64113002112013), we get a palindrome (95134122143159).

The spelling of 31021120031146 in words is "thirty-one trillion, twenty-one billion, one hundred twenty million, thirty-one thousand, one hundred forty-six".