311113121009 has 2 divisors, whose sum is σ = 311113121010. Its totient is φ = 311113121008.

The previous prime is 311113120993. The next prime is 311113121057. The reversal of 311113121009 is 900121311113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278124390625 + 32988730384 = 527375^2 + 181628^2 .

It is a cyclic number.

It is not a de Polignac number, because 311113121009 - 2⁴ = 311113120993 is a prime.

It is not a weakly prime, because it can be changed into another prime (311113121089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155556560504 + 155556560505.

It is an arithmetic number, because the mean of its divisors is an integer number (155556560505).

Almost surely, 2^311113121009 is an apocalyptic number.

It is an amenable number.

311113121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

311113121009 is an equidigital number, since it uses as much as digits as its factorization.

311113121009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 311113121009 in words is "three hundred eleven billion, one hundred thirteen million, one hundred twenty-one thousand, nine".