121927737979 has 2 divisors, whose sum is σ = 121927737980. Its totient is φ = 121927737978.

The previous prime is 121927737961. The next prime is 121927737989. The reversal of 121927737979 is 979737729121.

It is a strong prime.

It is an emirp because it is prime and its reverse (979737729121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121927737979 - 2⁷ = 121927737851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121927737979.

It is not a weakly prime, because it can be changed into another prime (121927737949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60963868989 + 60963868990.

It is an arithmetic number, because the mean of its divisors is an integer number (60963868990).

Almost surely, 2^121927737979 is an apocalyptic number.

121927737979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121927737979 is an equidigital number, since it uses as much as digits as its factorization.

121927737979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21003948, while the sum is 64.

The spelling of 121927737979 in words is "one hundred twenty-one billion, nine hundred twenty-seven million, seven hundred thirty-seven thousand, nine hundred seventy-nine".