31013213120211 has 24 divisors (see below), whose sum is σ = 48551679080640. Its totient is φ = 17556211423632.

The previous prime is 31013213120203. The next prime is 31013213120237. The reversal of 31013213120211 is 11202131231013.

It is not a de Polignac number, because 31013213120211 - 2³ = 31013213120203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31013213120411) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 985845201 + ... + 985876658.

It is an arithmetic number, because the mean of its divisors is an integer number (2022986628360).

Almost surely, 2^{31013213120211} is an apocalyptic number.

31013213120211 is a deficient number, since it is larger than the sum of its proper divisors (17538465960429).

31013213120211 is a wasteful number, since it uses less digits than its factorization.

31013213120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971721983 (or 1971721976 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31013213120211 its reverse (11202131231013), we get a palindrome (42215344351224).

The spelling of 31013213120211 in words is "thirty-one trillion, thirteen billion, two hundred thirteen million, one hundred twenty thousand, two hundred eleven".