311202022009 has 2 divisors, whose sum is σ = 311202022010. Its totient is φ = 311202022008.

The previous prime is 311202022007. The next prime is 311202022013. The reversal of 311202022009 is 900220202113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267247641600 + 43954380409 = 516960^2 + 209653^2 .

It is a cyclic number.

It is not a de Polignac number, because 311202022009 - 2¹ = 311202022007 is a prime.

Together with 311202022007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (311202022007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155601011004 + 155601011005.

It is an arithmetic number, because the mean of its divisors is an integer number (155601011005).

Almost surely, 2^311202022009 is an apocalyptic number.

It is an amenable number.

311202022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

311202022009 is an equidigital number, since it uses as much as digits as its factorization.

311202022009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 311202022009 in words is "three hundred eleven billion, two hundred two million, twenty-two thousand, nine".