113421121 has 4 divisors (see below), whose sum is σ = 123732144. Its totient is φ = 103110100.

The previous prime is 113421109. The next prime is 113421163. The reversal of 113421121 is 121124311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113421121 - 2⁹ = 113420609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113421095 and 113421104.

It is not an unprimeable number, because it can be changed into a prime (113421521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5155495 + ... + 5155516.

It is an arithmetic number, because the mean of its divisors is an integer number (30933036).

Almost surely, 2^113421121 is an apocalyptic number.

113421121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113421121 is a deficient number, since it is larger than the sum of its proper divisors (10311023).

113421121 is a wasteful number, since it uses less digits than its factorization.

113421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10311022.

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

The square root of 113421121 is about 10649.9352580192. The cubic root of 113421121 is about 484.0586424061.

Adding to 113421121 its reverse (121124311), we get a palindrome (234545432).

The spelling of 113421121 in words is "one hundred thirteen million, four hundred twenty-one thousand, one hundred twenty-one".