121344155 has 4 divisors (see below), whose sum is σ = 145612992. Its totient is φ = 97075320.

The previous prime is 121344131. The next prime is 121344161. The reversal of 121344155 is 551443121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551443121 = 1021 ⋅540101.

It is not a de Polignac number, because 121344155 - 2²⁰ = 120295579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12134411 + ... + 12134420.

It is an arithmetic number, because the mean of its divisors is an integer number (36403248).

Almost surely, 2^121344155 is an apocalyptic number.

121344155 is a deficient number, since it is larger than the sum of its proper divisors (24268837).

121344155 is an equidigital number, since it uses as much as digits as its factorization.

121344155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268836.

The product of its digits is 2400, while the sum is 26.

The square root of 121344155 is about 11015.6323014160. The cubic root of 121344155 is about 495.0772317680.

Adding to 121344155 its reverse (551443121), we get a palindrome (672787276).

The spelling of 121344155 in words is "one hundred twenty-one million, three hundred forty-four thousand, one hundred fifty-five".