121045155 has 32 divisors (see below), whose sum is σ = 241463808. Its totient is φ = 50304000.

The previous prime is 121045147. The next prime is 121045157. The reversal of 121045155 is 551540121.

It is not a de Polignac number, because 121045155 - 2³ = 121045147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121045157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51246 + ... + 53555.

It is an arithmetic number, because the mean of its divisors is an integer number (7545744).

Almost surely, 2^121045155 is an apocalyptic number.

121045155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121045155 is a deficient number, since it is larger than the sum of its proper divisors (120418653).

121045155 is a wasteful number, since it uses less digits than its factorization.

121045155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104827.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 121045155 is about 11002.0523085468. The cubic root of 121045155 is about 494.6702630031.

Adding to 121045155 its reverse (551540121), we get a palindrome (672585276).

The spelling of 121045155 in words is "one hundred twenty-one million, forty-five thousand, one hundred fifty-five".