31201123323013 has 12 divisors (see below), whose sum is σ = 36304891677120. Its totient is φ = 26736667167672.

The previous prime is 31201123322947. The next prime is 31201123323017. The reversal of 31201123323013 is 31032332110213.

It is not a de Polignac number, because 31201123323013 - 2²¹ = 31201121225861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201123323017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84967581 + ... + 85334002.

It is an arithmetic number, because the mean of its divisors is an integer number (3025407639760).

Almost surely, 2^{31201123323013} is an apocalyptic number.

It is an amenable number.

31201123323013 is a deficient number, since it is larger than the sum of its proper divisors (5103768354107).

31201123323013 is a wasteful number, since it uses less digits than its factorization.

31201123323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170305336 (or 170305329 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31201123323013 its reverse (31032332110213), we get a palindrome (62233455433226).

The spelling of 31201123323013 in words is "thirty-one trillion, two hundred one billion, one hundred twenty-three million, three hundred twenty-three thousand, thirteen".