311121113 has 4 divisors (see below), whose sum is σ = 311170020. Its totient is φ = 311072208.

The previous prime is 311121073. The next prime is 311121121.

It is a happy number.

311121113 is nontrivially palindromic in base 10.

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 260241424 + 50879689 = 16132^2 + 7133^2 .

It is a cyclic number.

It is not a de Polignac number, because 311121113 - 2⁸ = 311120857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311121163) 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, 13178 + ... + 28211.

It is an arithmetic number, because the mean of its divisors is an integer number (77792505).

Almost surely, 2^311121113 is an apocalyptic number.

It is an amenable number.

311121113 is a deficient number, since it is larger than the sum of its proper divisors (48907).

311121113 is an equidigital number, since it uses as much as digits as its factorization.

311121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48906.

The product of its digits is 18, while the sum is 14.

The square root of 311121113 is about 17638.6255983849. The cubic root of 311121113 is about 677.6048324774.

The spelling of 311121113 in words is "three hundred eleven million, one hundred twenty-one thousand, one hundred thirteen".