311121007 has 2 divisors, whose sum is σ = 311121008. Its totient is φ = 311121006.

The previous prime is 311120987. The next prime is 311121043. The reversal of 311121007 is 700121113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311121007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311121907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560503 + 155560504.

It is an arithmetic number, because the mean of its divisors is an integer number (155560504).

Almost surely, 2^311121007 is an apocalyptic number.

311121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

311121007 is an equidigital number, since it uses as much as digits as its factorization.

311121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 311121007 is about 17638.6225936154. The cubic root of 311121007 is about 677.6047555233.

The spelling of 311121007 in words is "three hundred eleven million, one hundred twenty-one thousand, seven".