113202121 has 4 divisors (see below), whose sum is σ = 113376132. Its totient is φ = 113028112.

The previous prime is 113202091. The next prime is 113202127. The reversal of 113202121 is 121202311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14478025 + 98724096 = 3805^2 + 9936^2 .

It is a cyclic number.

It is not a de Polignac number, because 113202121 - 2⁹ = 113201609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113202127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86026 + ... + 87331.

It is an arithmetic number, because the mean of its divisors is an integer number (28344033).

Almost surely, 2^113202121 is an apocalyptic number.

It is an amenable number.

113202121 is a deficient number, since it is larger than the sum of its proper divisors (174011).

113202121 is an equidigital number, since it uses as much as digits as its factorization.

113202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174010.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 113202121 is about 10639.6485374283. The cubic root of 113202121 is about 483.7468922831.

Adding to 113202121 its reverse (121202311), we get a palindrome (234404432).

The spelling of 113202121 in words is "one hundred thirteen million, two hundred two thousand, one hundred twenty-one".