121109055 has 16 divisors (see below), whose sum is σ = 194158944. Its totient is φ = 64463360.

The previous prime is 121109047. The next prime is 121109057. The reversal of 121109055 is 550901121.

It is not a de Polignac number, because 121109055 - 2³ = 121109047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121109057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67 + ... + 15563.

It is an arithmetic number, because the mean of its divisors is an integer number (12134934).

Almost surely, 2^121109055 is an apocalyptic number.

121109055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121109055 is a deficient number, since it is larger than the sum of its proper divisors (73049889).

121109055 is a wasteful number, since it uses less digits than its factorization.

121109055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16026.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 121109055 is about 11004.9559290349. The cubic root of 121109055 is about 494.7572935255.

The spelling of 121109055 in words is "one hundred twenty-one million, one hundred nine thousand, fifty-five".