313220123131 has 4 divisors (see below), whose sum is σ = 313446931264. Its totient is φ = 312993315000.

The previous prime is 313220123119. The next prime is 313220123147. The reversal of 313220123131 is 131321022313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131321022313 = 13 ⋅10101617101.

It is a cyclic number.

It is not a de Polignac number, because 313220123131 - 2¹³ = 313220114939 is a prime.

It is a super-2 number, since 2×313220123131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313220123191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113401995 + ... + 113404756.

It is an arithmetic number, because the mean of its divisors is an integer number (78361732816).

Almost surely, 2^313220123131 is an apocalyptic number.

313220123131 is a deficient number, since it is larger than the sum of its proper divisors (226808133).

313220123131 is a wasteful number, since it uses less digits than its factorization.

313220123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226808132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 313220123131 its reverse (131321022313), we get a palindrome (444541145444).

The spelling of 313220123131 in words is "three hundred thirteen billion, two hundred twenty million, one hundred twenty-three thousand, one hundred thirty-one".