121165018 has 32 divisors (see below), whose sum is σ = 208039104. Its totient is φ = 52430592.

The previous prime is 121165007. The next prime is 121165021. The reversal of 121165018 is 810561121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121164983 and 121165001.

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, 206121 + ... + 206707.

It is an arithmetic number, because the mean of its divisors is an integer number (6501222).

Almost surely, 2^121165018 is an apocalyptic number.

121165018 is a deficient number, since it is larger than the sum of its proper divisors (86874086).

121165018 is a wasteful number, since it uses less digits than its factorization.

121165018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 121165018 is about 11007.4982625481. The cubic root of 121165018 is about 494.8334888706.

The spelling of 121165018 in words is "one hundred twenty-one million, one hundred sixty-five thousand, eighteen".