121525963399 has 2 divisors, whose sum is σ = 121525963400. Its totient is φ = 121525963398.

The previous prime is 121525963379. The next prime is 121525963421. The reversal of 121525963399 is 993369525121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121525963399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121525963379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60762981699 + 60762981700.

It is an arithmetic number, because the mean of its divisors is an integer number (60762981700).

Almost surely, 2^121525963399 is an apocalyptic number.

121525963399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121525963399 is an equidigital number, since it uses as much as digits as its factorization.

121525963399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3936600, while the sum is 55.

The spelling of 121525963399 in words is "one hundred twenty-one billion, five hundred twenty-five million, nine hundred sixty-three thousand, three hundred ninety-nine".