113142121 has 16 divisors (see below), whose sum is σ = 118412928. Its totient is φ = 108035200.

The previous prime is 113142103. The next prime is 113142143. The reversal of 113142121 is 121241311.

It is not a de Polignac number, because 113142121 - 2¹⁷ = 113011049 is a prime.

It is a super-2 number, since 2×113142121² = 25602279088757282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113142095 and 113142104.

It is not an unprimeable number, because it can be changed into a prime (113142181) 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, 402501 + ... + 402781.

It is an arithmetic number, because the mean of its divisors is an integer number (7400808).

Almost surely, 2^113142121 is an apocalyptic number.

It is an amenable number.

113142121 is a deficient number, since it is larger than the sum of its proper divisors (5270807).

113142121 is a wasteful number, since it uses less digits than its factorization.

113142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 48, while the sum is 16.

The square root of 113142121 is about 10636.8285216976. The cubic root of 113142121 is about 483.6614111314.

Adding to 113142121 its reverse (121241311), we get a palindrome (234383432).

The spelling of 113142121 in words is "one hundred thirteen million, one hundred forty-two thousand, one hundred twenty-one".