113121155 has 36 divisors (see below), whose sum is σ = 166786560. Its totient is φ = 73428768.

The previous prime is 113121121. The next prime is 113121157. The reversal of 113121155 is 551121311.

It is a happy number.

It is not a de Polignac number, because 113121155 - 2⁸ = 113120899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113121157) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87806 + ... + 89084.

It is an arithmetic number, because the mean of its divisors is an integer number (4632960).

Almost surely, 2^113121155 is an apocalyptic number.

113121155 is a deficient number, since it is larger than the sum of its proper divisors (53665405).

113121155 is a wasteful number, since it uses less digits than its factorization.

113121155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1310 counting only the distinct ones).

The product of its digits is 150, while the sum is 20.

The square root of 113121155 is about 10635.8429379152. The cubic root of 113121155 is about 483.6315340427.

Adding to 113121155 its reverse (551121311), we get a palindrome (664242466).

The spelling of 113121155 in words is "one hundred thirteen million, one hundred twenty-one thousand, one hundred fifty-five".