2113001220 has 144 divisors (see below), whose sum is σ = 6614717760. Its totient is φ = 503458560.

The previous prime is 2113001207. The next prime is 2113001309. The reversal of 2113001220 is 221003112.

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 = 2113001196 and 2113001205.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 425874 + ... + 430806.

It is an arithmetic number, because the mean of its divisors is an integer number (45935540).

Almost surely, 2^2113001220 is an apocalyptic number.

2113001220 is a gapful number since it is divisible by the number (20) 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 2113001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3307358880).

2113001220 is an abundant number, since it is smaller than the sum of its proper divisors (4501716540).

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

2113001220 is a wasteful number, since it uses less digits than its factorization.

2113001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2113001220 is about 45967.3930085229. The cubic root of 2113001220 is about 1283.2164428683.

Adding to 2113001220 its reverse (221003112), we get a palindrome (2334004332).

The spelling of 2113001220 in words is "two billion, one hundred thirteen million, one thousand, two hundred twenty".