121350155 has 4 divisors (see below), whose sum is σ = 145620192. Its totient is φ = 97080120.

The previous prime is 121350149. The next prime is 121350157. The reversal of 121350155 is 551053121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121350155 - 2¹⁰ = 121349131 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 121350155.

It is not an unprimeable number, because it can be changed into a prime (121350157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12135011 + ... + 12135020.

It is an arithmetic number, because the mean of its divisors is an integer number (36405048).

Almost surely, 2^121350155 is an apocalyptic number.

121350155 is a deficient number, since it is larger than the sum of its proper divisors (24270037).

121350155 is an equidigital number, since it uses as much as digits as its factorization.

121350155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24270036.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 121350155 is about 11015.9046382946. The cubic root of 121350155 is about 495.0853915195.

The spelling of 121350155 in words is "one hundred twenty-one million, three hundred fifty thousand, one hundred fifty-five".