122400908561 has 2 divisors, whose sum is σ = 122400908562. Its totient is φ = 122400908560.

The previous prime is 122400908549. The next prime is 122400908587. The reversal of 122400908561 is 165809004221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115844929600 + 6555978961 = 340360^2 + 80969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122400908561 is a prime.

It is not a weakly prime, because it can be changed into another prime (122400908761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61200454280 + 61200454281.

It is an arithmetic number, because the mean of its divisors is an integer number (61200454281).

Almost surely, 2^122400908561 is an apocalyptic number.

It is an amenable number.

122400908561 is a deficient number, since it is larger than the sum of its proper divisors (1).

122400908561 is an equidigital number, since it uses as much as digits as its factorization.

122400908561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 122400908561 in words is "one hundred twenty-two billion, four hundred million, nine hundred eight thousand, five hundred sixty-one".