121243451 has 4 divisors (see below), whose sum is σ = 138563952. Its totient is φ = 103922952.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243451 is 154342121.

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

It is not a de Polignac number, because 121243451 - 2¹⁰ = 121242427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243457) 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, 8660240 + ... + 8660253.

It is an arithmetic number, because the mean of its divisors is an integer number (34640988).

Almost surely, 2^121243451 is an apocalyptic number.

121243451 is a deficient number, since it is larger than the sum of its proper divisors (17320501).

121243451 is an equidigital number, since it uses as much as digits as its factorization.

121243451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17320500.

The product of its digits is 960, while the sum is 23.

The square root of 121243451 is about 11011.0603939857. The cubic root of 121243451 is about 494.9402383384.

Adding to 121243451 its reverse (154342121), we get a palindrome (275585572).

The spelling of 121243451 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred fifty-one".