2113112220 has 48 divisors (see below), whose sum is σ = 5920266240. Its totient is φ = 563158336.

The previous prime is 2113112219. The next prime is 2113112237. The reversal of 2113112220 is 222113112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2113112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99721 + ... + 119039.

It is an arithmetic number, because the mean of its divisors is an integer number (123338880).

Almost surely, 2^2113112220 is an apocalyptic number.

2113112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113112220 is an abundant number, since it is smaller than the sum of its proper divisors (3807154020).

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

2113112220 is a wasteful number, since it uses less digits than its factorization.

2113112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21154 (or 21152 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2113112220 is about 45968.6003702527. The cubic root of 2113112220 is about 1283.2389124138.

Adding to 2113112220 its reverse (222113112), we get a palindrome (2335225332).

It can be divided in two parts, 211311 and 2220, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 2113112220 in words is "two billion, one hundred thirteen million, one hundred twelve thousand, two hundred twenty".