121154145 has 16 divisors (see below), whose sum is σ = 221539200. Its totient is φ = 55384704.

The previous prime is 121154129. The next prime is 121154161. The reversal of 121154145 is 541451121.

It is an interprime number because it is at equal distance from previous prime (121154129) and next prime (121154161).

It is not a de Polignac number, because 121154145 - 2⁴ = 121154129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576820 + ... + 577029.

It is an arithmetic number, because the mean of its divisors is an integer number (13846200).

Almost surely, 2^121154145 is an apocalyptic number.

121154145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121154145 is a deficient number, since it is larger than the sum of its proper divisors (100385055).

121154145 is a wasteful number, since it uses less digits than its factorization.

121154145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153864.

The product of its digits is 800, while the sum is 24.

The square root of 121154145 is about 11007.0043608604. The cubic root of 121154145 is about 494.8186867835.

The spelling of 121154145 in words is "one hundred twenty-one million, one hundred fifty-four thousand, one hundred forty-five".