121232155 has 8 divisors (see below), whose sum is σ = 158703984. Its totient is φ = 88168800.

The previous prime is 121232143. The next prime is 121232159. The reversal of 121232155 is 551232121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121232155 - 2⁵ = 121232123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121232159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102056 + ... + 1102165.

It is an arithmetic number, because the mean of its divisors is an integer number (19837998).

Almost surely, 2^121232155 is an apocalyptic number.

121232155 is a deficient number, since it is larger than the sum of its proper divisors (37471829).

121232155 is a wasteful number, since it uses less digits than its factorization.

121232155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204237.

The product of its digits is 600, while the sum is 22.

The square root of 121232155 is about 11010.5474432473. The cubic root of 121232155 is about 494.9248670104.

Adding to 121232155 its reverse (551232121), we get a palindrome (672464276).

The spelling of 121232155 in words is "one hundred twenty-one million, two hundred thirty-two thousand, one hundred fifty-five".