121323655 has 4 divisors (see below), whose sum is σ = 145588392. Its totient is φ = 97058920.

The previous prime is 121323641. The next prime is 121323659. The reversal of 121323655 is 556323121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556323121 = 43 ⋅12937747.

It is not a de Polignac number, because 121323655 - 2⁹ = 121323143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12132361 + ... + 12132370.

It is an arithmetic number, because the mean of its divisors is an integer number (36397098).

Almost surely, 2^121323655 is an apocalyptic number.

121323655 is a deficient number, since it is larger than the sum of its proper divisors (24264737).

121323655 is an equidigital number, since it uses as much as digits as its factorization.

121323655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24264736.

The product of its digits is 5400, while the sum is 28.

The square root of 121323655 is about 11014.7017662758. The cubic root of 121323655 is about 495.0493505876.

Adding to 121323655 its reverse (556323121), we get a palindrome (677646776).

The spelling of 121323655 in words is "one hundred twenty-one million, three hundred twenty-three thousand, six hundred fifty-five".