121455988 has 6 divisors (see below), whose sum is σ = 212547986. Its totient is φ = 60727992.

The previous prime is 121455977. The next prime is 121455991. The reversal of 121455988 is 889554121.

It can be written as a sum of positive squares in only one way, i.e., 121264144 + 191844 = 11012^2 + 438^2 .

It is a super-2 number, since 2×121455988² = 29503114042112288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15181995 + ... + 15182002.

Almost surely, 2^121455988 is an apocalyptic number.

It is an amenable number.

121455988 is a deficient number, since it is larger than the sum of its proper divisors (91091998).

121455988 is a wasteful number, since it uses less digits than its factorization.

121455988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30364001 (or 30363999 counting only the distinct ones).

The product of its digits is 115200, while the sum is 43.

The square root of 121455988 is about 11020.7072368338. The cubic root of 121455988 is about 495.2292758227.

The spelling of 121455988 in words is "one hundred twenty-one million, four hundred fifty-five thousand, nine hundred eighty-eight".