121325613 has 4 divisors (see below), whose sum is σ = 161767488. Its totient is φ = 80883740.

The previous prime is 121325569. The next prime is 121325669. The reversal of 121325613 is 316523121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 316523121 = 3 ⋅105507707.

It is a cyclic number.

It is not a de Polignac number, because 121325613 - 2¹³ = 121317421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323613) 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, 20220933 + ... + 20220938.

It is an arithmetic number, because the mean of its divisors is an integer number (40441872).

Almost surely, 2^121325613 is an apocalyptic number.

It is an amenable number.

121325613 is a deficient number, since it is larger than the sum of its proper divisors (40441875).

121325613 is an equidigital number, since it uses as much as digits as its factorization.

121325613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40441874.

The product of its digits is 1080, while the sum is 24.

The square root of 121325613 is about 11014.7906471253. The cubic root of 121325613 is about 495.0520137160.

Adding to 121325613 its reverse (316523121), we get a palindrome (437848734).

The spelling of 121325613 in words is "one hundred twenty-one million, three hundred twenty-five thousand, six hundred thirteen".