311312420310121 has 4 divisors (see below), whose sum is σ = 311351663028292. Its totient is φ = 311273177591952.

The previous prime is 311312420310083. The next prime is 311312420310173. The reversal of 311312420310121 is 121013024213113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 220762065828096 + 90550354482025 = 14858064^2 + 9515795^2 .

It is a cyclic number.

It is not a de Polignac number, because 311312420310121 - 2⁷ = 311312420309993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311312420310821) 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, 19621347186 + ... + 19621363051.

It is an arithmetic number, because the mean of its divisors is an integer number (77837915757073).

Almost surely, 2^{311312420310121} is an apocalyptic number.

It is an amenable number.

311312420310121 is a deficient number, since it is larger than the sum of its proper divisors (39242718171).

311312420310121 is an equidigital number, since it uses as much as digits as its factorization.

311312420310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39242718170.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 311312420310121 its reverse (121013024213113), we get a palindrome (432325444523234).

The spelling of 311312420310121 in words is "three hundred eleven trillion, three hundred twelve billion, four hundred twenty million, three hundred ten thousand, one hundred twenty-one".