121525963379 has 2 divisors, whose sum is σ = 121525963380. Its totient is φ = 121525963378.

The previous prime is 121525963337. The next prime is 121525963399. The reversal of 121525963379 is 973369525121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121525963379 - 2⁸ = 121525963123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121525963379.

It is not a weakly prime, because it can be changed into another prime (121525963399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60762981689 + 60762981690.

It is an arithmetic number, because the mean of its divisors is an integer number (60762981690).

Almost surely, 2^121525963379 is an apocalyptic number.

121525963379 is a deficient number, since it is larger than the sum of its proper divisors (1).

121525963379 is an equidigital number, since it uses as much as digits as its factorization.

121525963379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3061800, while the sum is 53.

The spelling of 121525963379 in words is "one hundred twenty-one billion, five hundred twenty-five million, nine hundred sixty-three thousand, three hundred seventy-nine".