313131120212291 has 16 divisors (see below), whose sum is σ = 313937919828000. Its totient is φ = 312324831479808.

The previous prime is 313131120212233. The next prime is 313131120212347. The reversal of 313131120212291 is 192212021131313.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313131120212291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313131120212591) 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, 24747572921 + ... + 24747585573.

It is an arithmetic number, because the mean of its divisors is an integer number (19621119989250).

Almost surely, 2^{313131120212291} is an apocalyptic number.

313131120212291 is a deficient number, since it is larger than the sum of its proper divisors (806799615709).

313131120212291 is a wasteful number, since it uses less digits than its factorization.

313131120212291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27958.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 313131120212291 in words is "three hundred thirteen trillion, one hundred thirty-one billion, one hundred twenty million, two hundred twelve thousand, two hundred ninety-one".