121413155 has 4 divisors (see below), whose sum is σ = 145695792. Its totient is φ = 97130520.

The previous prime is 121413139. The next prime is 121413163. The reversal of 121413155 is 551314121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551314121 = 929 ⋅593449.

It is not a de Polignac number, because 121413155 - 2⁴ = 121413139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121413155.

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, 12141311 + ... + 12141320.

It is an arithmetic number, because the mean of its divisors is an integer number (36423948).

Almost surely, 2^121413155 is an apocalyptic number.

121413155 is a deficient number, since it is larger than the sum of its proper divisors (24282637).

121413155 is an equidigital number, since it uses as much as digits as its factorization.

121413155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24282636.

The product of its digits is 600, while the sum is 23.

The square root of 121413155 is about 11018.7637691349. The cubic root of 121413155 is about 495.1710526754.

Adding to 121413155 its reverse (551314121), we get a palindrome (672727276).

The spelling of 121413155 in words is "one hundred twenty-one million, four hundred thirteen thousand, one hundred fifty-five".