113111220 has 48 divisors (see below), whose sum is σ = 325277568. Its totient is φ = 29347200.

The previous prime is 113111203. The next prime is 113111221. The reversal of 113111220 is 22111311.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 113111196 and 113111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113111221) 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, 23256 + ... + 27695.

It is an arithmetic number, because the mean of its divisors is an integer number (6776616).

Almost surely, 2^113111220 is an apocalyptic number.

113111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113111220 is an abundant number, since it is smaller than the sum of its proper divisors (212166348).

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

113111220 is a wasteful number, since it uses less digits than its factorization.

113111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51000 (or 50998 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 113111220 is about 10635.3758748810. The cubic root of 113111220 is about 483.6173751232.

Adding to 113111220 its reverse (22111311), we get a palindrome (135222531).

Subtracting from 113111220 its reverse (22111311), we obtain a palindrome (90999909).

The spelling of 113111220 in words is "one hundred thirteen million, one hundred eleven thousand, two hundred twenty".