313122123331 has 4 divisors (see below), whose sum is σ = 313637975872. Its totient is φ = 312606270792.

The previous prime is 313122123317. The next prime is 313122123341. The reversal of 313122123331 is 133321221313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313122123331 is a prime.

It is a super-2 number, since 2×313122123331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313122123296 and 313122123305.

It is not an unprimeable number, because it can be changed into a prime (313122123341) 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, 257925360 + ... + 257926573.

It is an arithmetic number, because the mean of its divisors is an integer number (78409493968).

Almost surely, 2^313122123331 is an apocalyptic number.

313122123331 is a deficient number, since it is larger than the sum of its proper divisors (515852541).

313122123331 is an equidigital number, since it uses as much as digits as its factorization.

313122123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515852540.

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

Adding to 313122123331 its reverse (133321221313), we get a palindrome (446443344644).

The spelling of 313122123331 in words is "three hundred thirteen billion, one hundred twenty-two million, one hundred twenty-three thousand, three hundred thirty-one".