113121180 has 72 divisors (see below), whose sum is σ = 344215872. Its totient is φ = 30070656.

The previous prime is 113121167. The next prime is 113121187. The reversal of 113121180 is 81121311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70669 + ... + 72251.

It is an arithmetic number, because the mean of its divisors is an integer number (4780776).

Almost surely, 2^113121180 is an apocalyptic number.

113121180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113121180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172107936).

113121180 is an abundant number, since it is smaller than the sum of its proper divisors (231094692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

113121180 is a wasteful number, since it uses less digits than its factorization.

113121180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 113121180 is about 10635.8441131863. The cubic root of 113121180 is about 483.6315696705.

Adding to 113121180 its reverse (81121311), we get a palindrome (194242491).

The spelling of 113121180 in words is "one hundred thirteen million, one hundred twenty-one thousand, one hundred eighty".