122515204991 has 2 divisors, whose sum is σ = 122515204992. Its totient is φ = 122515204990.

The previous prime is 122515204979. The next prime is 122515205069. The reversal of 122515204991 is 199402515221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122515204991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122515204921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61257602495 + 61257602496.

It is an arithmetic number, because the mean of its divisors is an integer number (61257602496).

Almost surely, 2^122515204991 is an apocalyptic number.

122515204991 is a deficient number, since it is larger than the sum of its proper divisors (1).

122515204991 is an equidigital number, since it uses as much as digits as its factorization.

122515204991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 122515204991 in words is "one hundred twenty-two billion, five hundred fifteen million, two hundred four thousand, nine hundred ninety-one".