121725113 has 4 divisors (see below), whose sum is σ = 121757988. Its totient is φ = 121692240.

The previous prime is 121725101. The next prime is 121725137. The reversal of 121725113 is 311527121.

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 5257849 + 116467264 = 2293^2 + 10792^2 .

It is a cyclic number.

It is not a de Polignac number, because 121725113 - 2²⁶ = 54616249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121725143) 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, 10058 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (30439497).

Almost surely, 2^121725113 is an apocalyptic number.

It is an amenable number.

121725113 is a deficient number, since it is larger than the sum of its proper divisors (32875).

121725113 is an equidigital number, since it uses as much as digits as its factorization.

121725113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32874.

The product of its digits is 420, while the sum is 23.

The square root of 121725113 is about 11032.9104501034. The cubic root of 121725113 is about 495.5947861650.

The spelling of 121725113 in words is "one hundred twenty-one million, seven hundred twenty-five thousand, one hundred thirteen".