121798988 has 6 divisors (see below), whose sum is σ = 213148236. Its totient is φ = 60899492.

The previous prime is 121798913. The next prime is 121798997. The reversal of 121798988 is 889897121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15224870 + ... + 15224877.

It is an arithmetic number, because the mean of its divisors is an integer number (35524706).

Almost surely, 2^121798988 is an apocalyptic number.

It is an amenable number.

121798988 is a deficient number, since it is larger than the sum of its proper divisors (91349248).

121798988 is a wasteful number, since it uses less digits than its factorization.

121798988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30449751 (or 30449749 counting only the distinct ones).

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

The square root of 121798988 is about 11036.2578802781. The cubic root of 121798988 is about 495.6950247540.

The spelling of 121798988 in words is "one hundred twenty-one million, seven hundred ninety-eight thousand, nine hundred eighty-eight".