31213020041 has 24 divisors (see below), whose sum is σ = 37662555744. Its totient is φ = 25773733440.

The previous prime is 31213019993. The next prime is 31213020043. The reversal of 31213020041 is 14002031213.

It is not a de Polignac number, because 31213020041 - 2⁶ = 31213019977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213020043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52346 + ... + 255276.

It is an arithmetic number, because the mean of its divisors is an integer number (1569273156).

Almost surely, 2^31213020041 is an apocalyptic number.

It is an amenable number.

31213020041 is a deficient number, since it is larger than the sum of its proper divisors (6449535703).

31213020041 is a wasteful number, since it uses less digits than its factorization.

31213020041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203061 (or 203054 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31213020041 its reverse (14002031213), we get a palindrome (45215051254).

The spelling of 31213020041 in words is "thirty-one billion, two hundred thirteen million, twenty thousand, forty-one".