121038165 has 32 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 64411200.

The previous prime is 121038157. The next prime is 121038187. The reversal of 121038165 is 561830121.

It is not a de Polignac number, because 121038165 - 2³ = 121038157 is a prime.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93996 + ... + 95274.

It is an arithmetic number, because the mean of its divisors is an integer number (6739200).

Almost surely, 2^121038165 is an apocalyptic number.

121038165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121038165 is a deficient number, since it is larger than the sum of its proper divisors (94616235).

121038165 is a wasteful number, since it uses less digits than its factorization.

121038165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1988 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 121038165 is about 11001.7346359563. The cubic root of 121038165 is about 494.6607409045.

Adding to 121038165 its reverse (561830121), we get a palindrome (682868286).

The spelling of 121038165 in words is "one hundred twenty-one million, thirty-eight thousand, one hundred sixty-five".