113403121 has 4 divisors (see below), whose sum is σ = 122126452. Its totient is φ = 104679792.

The previous prime is 113403119. The next prime is 113403167. The reversal of 113403121 is 121304311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121304311 = 9587 ⋅12653.

It can be written as a sum of positive squares in 2 ways, for example, as 55338721 + 58064400 = 7439^2 + 7620^2 .

It is a cyclic number.

It is not a de Polignac number, because 113403121 - 2¹ = 113403119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113403095 and 113403104.

It is not an unprimeable number, because it can be changed into a prime (113403221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4361646 + ... + 4361671.

It is an arithmetic number, because the mean of its divisors is an integer number (30531613).

Almost surely, 2^113403121 is an apocalyptic number.

It is an amenable number.

113403121 is a deficient number, since it is larger than the sum of its proper divisors (8723331).

113403121 is an equidigital number, since it uses as much as digits as its factorization.

113403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8723330.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 113403121 is about 10649.0901489282. The cubic root of 113403121 is about 484.0330342523.

Adding to 113403121 its reverse (121304311), we get a palindrome (234707432).

The spelling of 113403121 in words is "one hundred thirteen million, four hundred three thousand, one hundred twenty-one".