121888799 has 4 divisors (see below), whose sum is σ = 127188336. Its totient is φ = 116589264.

The previous prime is 121888787. The next prime is 121888801. The reversal of 121888799 is 997888121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997888121 = 13997 ⋅71293.

It is a cyclic number.

It is not a de Polignac number, because 121888799 - 2⁴ = 121888783 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 121888799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121888099) 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, 2649734 + ... + 2649779.

It is an arithmetic number, because the mean of its divisors is an integer number (31797084).

Almost surely, 2^121888799 is an apocalyptic number.

121888799 is a deficient number, since it is larger than the sum of its proper divisors (5299537).

121888799 is an equidigital number, since it uses as much as digits as its factorization.

121888799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299536.

The product of its digits is 580608, while the sum is 53.

The square root of 121888799 is about 11040.3260368524. The cubic root of 121888799 is about 495.8168318089.

The spelling of 121888799 in words is "one hundred twenty-one million, eight hundred eighty-eight thousand, seven hundred ninety-nine".