121336251 has 4 divisors (see below), whose sum is σ = 161781672. Its totient is φ = 80890832.

The previous prime is 121336219. The next prime is 121336253. The reversal of 121336251 is 152633121.

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

It is a cyclic number.

It is not a de Polignac number, because 121336251 - 2⁵ = 121336219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121336253) 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, 20222706 + ... + 20222711.

It is an arithmetic number, because the mean of its divisors is an integer number (40445418).

Almost surely, 2^121336251 is an apocalyptic number.

121336251 is a deficient number, since it is larger than the sum of its proper divisors (40445421).

121336251 is an equidigital number, since it uses as much as digits as its factorization.

121336251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40445420.

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

The square root of 121336251 is about 11015.2735326909. The cubic root of 121336251 is about 495.0664822449.

Adding to 121336251 its reverse (152633121), we get a palindrome (273969372).

The spelling of 121336251 in words is "one hundred twenty-one million, three hundred thirty-six thousand, two hundred fifty-one".