121620510079 has 2 divisors, whose sum is σ = 121620510080. Its totient is φ = 121620510078.

The previous prime is 121620510071. The next prime is 121620510107. The reversal of 121620510079 is 970015026121.

It is a weak prime.

It is an emirp because it is prime and its reverse (970015026121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121620510079 - 2³ = 121620510071 is a prime.

It is a super-2 number, since 2×121620510079² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121620510071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810255039 + 60810255040.

It is an arithmetic number, because the mean of its divisors is an integer number (60810255040).

Almost surely, 2^121620510079 is an apocalyptic number.

121620510079 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620510079 is an equidigital number, since it uses as much as digits as its factorization.

121620510079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 121620510079 in words is "one hundred twenty-one billion, six hundred twenty million, five hundred ten thousand, seventy-nine".