122315578409 has 2 divisors, whose sum is σ = 122315578410. Its totient is φ = 122315578408.

The previous prime is 122315578403. The next prime is 122315578433. The reversal of 122315578409 is 904875513221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70983879184 + 51331699225 = 266428^2 + 226565^2 .

It is a cyclic number.

It is not a de Polignac number, because 122315578409 - 2²⁰ = 122314529833 is a prime.

It is a super-2 number, since 2×122315578409² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122315578403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61157789204 + 61157789205.

It is an arithmetic number, because the mean of its divisors is an integer number (61157789205).

Almost surely, 2^122315578409 is an apocalyptic number.

It is an amenable number.

122315578409 is a deficient number, since it is larger than the sum of its proper divisors (1).

122315578409 is an equidigital number, since it uses as much as digits as its factorization.

122315578409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 122315578409 in words is "one hundred twenty-two billion, three hundred fifteen million, five hundred seventy-eight thousand, four hundred nine".