121513241 has 4 divisors (see below), whose sum is σ = 121613184. Its totient is φ = 121413300.

The previous prime is 121513237. The next prime is 121513247. The reversal of 121513241 is 142315121.

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 121513241 - 2² = 121513237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121513247) 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, 48125 + ... + 50586.

It is an arithmetic number, because the mean of its divisors is an integer number (30403296).

Almost surely, 2^121513241 is an apocalyptic number.

It is an amenable number.

121513241 is a deficient number, since it is larger than the sum of its proper divisors (99943).

121513241 is an equidigital number, since it uses as much as digits as its factorization.

121513241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99942.

The product of its digits is 240, while the sum is 20.

The square root of 121513241 is about 11023.3044501184. The cubic root of 121513241 is about 495.3070787871.

Adding to 121513241 its reverse (142315121), we get a palindrome (263828362).

The spelling of 121513241 in words is "one hundred twenty-one million, five hundred thirteen thousand, two hundred forty-one".