121253513 has 4 divisors (see below), whose sum is σ = 121313808. Its totient is φ = 121193220.

The previous prime is 121253501. The next prime is 121253519. The reversal of 121253513 is 315352121.

It is a happy number.

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 121253513 - 2⁶ = 121253449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121253519) 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, 27023 + ... + 31188.

It is an arithmetic number, because the mean of its divisors is an integer number (30328452).

Almost surely, 2^121253513 is an apocalyptic number.

It is an amenable number.

121253513 is a deficient number, since it is larger than the sum of its proper divisors (60295).

121253513 is an equidigital number, since it uses as much as digits as its factorization.

121253513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60294.

The product of its digits is 900, while the sum is 23.

The square root of 121253513 is about 11011.5172887300. The cubic root of 121253513 is about 494.9539296646.

The spelling of 121253513 in words is "one hundred twenty-one million, two hundred fifty-three thousand, five hundred thirteen".