121115123 has 16 divisors (see below), whose sum is σ = 131453280. Its totient is φ = 111161856.

The previous prime is 121115083. The next prime is 121115129. The reversal of 121115123 is 321511121.

It is a cyclic number.

It is not a de Polignac number, because 121115123 - 2⁸ = 121114867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121115129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206036 + ... + 206622.

It is an arithmetic number, because the mean of its divisors is an integer number (8215830).

Almost surely, 2^121115123 is an apocalyptic number.

121115123 is a deficient number, since it is larger than the sum of its proper divisors (10338157).

121115123 is a wasteful number, since it uses less digits than its factorization.

121115123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 60, while the sum is 17.

The square root of 121115123 is about 11005.2316195526. The cubic root of 121115123 is about 494.7655564285.

Adding to 121115123 its reverse (321511121), we get a palindrome (442626244).

The spelling of 121115123 in words is "one hundred twenty-one million, one hundred fifteen thousand, one hundred twenty-three".