121913755 has 16 divisors (see below), whose sum is σ = 147891744. Its totient is φ = 96474880.

The previous prime is 121913741. The next prime is 121913773. The reversal of 121913755 is 557319121.

It is a de Polignac number, because none of the positive numbers 2^k-121913755 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121913755.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264225 + ... + 264685.

It is an arithmetic number, because the mean of its divisors is an integer number (9243234).

Almost surely, 2^121913755 is an apocalyptic number.

121913755 is a deficient number, since it is larger than the sum of its proper divisors (25977989).

121913755 is a wasteful number, since it uses less digits than its factorization.

121913755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926.

The product of its digits is 9450, while the sum is 34.

The square root of 121913755 is about 11041.4561992520. The cubic root of 121913755 is about 495.8506680065.

The spelling of 121913755 in words is "one hundred twenty-one million, nine hundred thirteen thousand, seven hundred fifty-five".