121173165 has 96 divisors (see below), whose sum is σ = 238492800. Its totient is φ = 58786560.

The previous prime is 121173139. The next prime is 121173181. The reversal of 121173165 is 561371121.

It is not a de Polignac number, because 121173165 - 2⁵ = 121173133 is a prime.

It is a super-2 number, since 2×121173165² = 29365871832234450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 669375 + ... + 669555.

It is an arithmetic number, because the mean of its divisors is an integer number (2484300).

Almost surely, 2^121173165 is an apocalyptic number.

121173165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121173165 is a deficient number, since it is larger than the sum of its proper divisors (117319635).

121173165 is a wasteful number, since it uses less digits than its factorization.

121173165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 237 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 121173165 is about 11007.8683222502. The cubic root of 121173165 is about 494.8445793051.

The spelling of 121173165 in words is "one hundred twenty-one million, one hundred seventy-three thousand, one hundred sixty-five".