121333155 has 8 divisors (see below), whose sum is σ = 194133072. Its totient is φ = 64711008.

The previous prime is 121333153. The next prime is 121333159. The reversal of 121333155 is 551333121.

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

It is not a de Polignac number, because 121333155 - 2¹ = 121333153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121333153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4044424 + ... + 4044453.

It is an arithmetic number, because the mean of its divisors is an integer number (24266634).

Almost surely, 2^121333155 is an apocalyptic number.

121333155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121333155 is a deficient number, since it is larger than the sum of its proper divisors (72799917).

121333155 is an equidigital number, since it uses as much as digits as its factorization.

121333155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088885.

The product of its digits is 1350, while the sum is 24.

The square root of 121333155 is about 11015.1329996510. The cubic root of 121333155 is about 495.0622715251.

Adding to 121333155 its reverse (551333121), we get a palindrome (672666276).

The spelling of 121333155 in words is "one hundred twenty-one million, three hundred thirty-three thousand, one hundred fifty-five".