311020122313 has 4 divisors (see below), whose sum is σ = 315400687488. Its totient is φ = 306639557140.

The previous prime is 311020122311. The next prime is 311020122349. The reversal of 311020122313 is 313221020113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313221020113 = 17 ⋅18424765889.

It is a cyclic number.

It is not a de Polignac number, because 311020122313 - 2¹ = 311020122311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311020122311) 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, 2190282481 + ... + 2190282622.

It is an arithmetic number, because the mean of its divisors is an integer number (78850171872).

Almost surely, 2^311020122313 is an apocalyptic number.

It is an amenable number.

311020122313 is a deficient number, since it is larger than the sum of its proper divisors (4380565175).

311020122313 is an equidigital number, since it uses as much as digits as its factorization.

311020122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380565174.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311020122313 its reverse (313221020113), we get a palindrome (624241142426).

The spelling of 311020122313 in words is "three hundred eleven billion, twenty million, one hundred twenty-two thousand, three hundred thirteen".