121525963393 has 4 divisors (see below), whose sum is σ = 121562714800. Its totient is φ = 121489211988.

The previous prime is 121525963379. The next prime is 121525963399. The reversal of 121525963393 is 393369525121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121525963393 - 2³³ = 112936028801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121525963399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18370743 + ... + 18377356.

It is an arithmetic number, because the mean of its divisors is an integer number (30390678700).

Almost surely, 2^121525963393 is an apocalyptic number.

It is an amenable number.

121525963393 is a deficient number, since it is larger than the sum of its proper divisors (36751407).

121525963393 is an equidigital number, since it uses as much as digits as its factorization.

121525963393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36751406.

The product of its digits is 1312200, while the sum is 49.

The spelling of 121525963393 in words is "one hundred twenty-one billion, five hundred twenty-five million, nine hundred sixty-three thousand, three hundred ninety-three".