311142121 has 2 divisors, whose sum is σ = 311142122. Its totient is φ = 311142120.

The previous prime is 311142113. The next prime is 311142163. The reversal of 311142121 is 121241113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219365721 + 91776400 = 14811^2 + 9580^2 .

It is a cyclic number.

It is not a de Polignac number, because 311142121 - 2³ = 311142113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311142095 and 311142104.

It is not a weakly prime, because it can be changed into another prime (311142101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155571060 + 155571061.

It is an arithmetic number, because the mean of its divisors is an integer number (155571061).

Almost surely, 2^311142121 is an apocalyptic number.

It is an amenable number.

311142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

311142121 is an equidigital number, since it uses as much as digits as its factorization.

311142121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 16.

The square root of 311142121 is about 17639.2210995837. The cubic root of 311142121 is about 677.6200835606.

Adding to 311142121 its reverse (121241113), we get a palindrome (432383234).

The spelling of 311142121 in words is "three hundred eleven million, one hundred forty-two thousand, one hundred twenty-one".