121542113 has 8 divisors (see below), whose sum is σ = 151533120. Its totient is φ = 94708080.

The previous prime is 121542101. The next prime is 121542133. The reversal of 121542113 is 311245121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121542113 - 2²² = 117347809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121542133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789158 + ... + 789311.

It is an arithmetic number, because the mean of its divisors is an integer number (18941640).

Almost surely, 2^121542113 is an apocalyptic number.

It is an amenable number.

121542113 is a deficient number, since it is larger than the sum of its proper divisors (29991007).

121542113 is a wasteful number, since it uses less digits than its factorization.

121542113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578487.

The product of its digits is 240, while the sum is 20.

The square root of 121542113 is about 11024.6139614954. The cubic root of 121542113 is about 495.3463046179.

Adding to 121542113 its reverse (311245121), we get a palindrome (432787234).

The spelling of 121542113 in words is "one hundred twenty-one million, five hundred forty-two thousand, one hundred thirteen".