311120121973 has 2 divisors, whose sum is σ = 311120121974. Its totient is φ = 311120121972.

The previous prime is 311120121857. The next prime is 311120122057. The reversal of 311120121973 is 379121021113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310202213764 + 917908209 = 556958^2 + 30297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311120121973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311120127973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560060986 + 155560060987.

It is an arithmetic number, because the mean of its divisors is an integer number (155560060987).

Almost surely, 2^311120121973 is an apocalyptic number.

It is an amenable number.

311120121973 is a deficient number, since it is larger than the sum of its proper divisors (1).

311120121973 is an equidigital number, since it uses as much as digits as its factorization.

311120121973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 311120121973 in words is "three hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, nine hundred seventy-three".