2013011220 has 96 divisors (see below), whose sum is σ = 6360923520. Its totient is φ = 471170560.

The previous prime is 2013011213. The next prime is 2013011227. The reversal of 2013011220 is 221103102.

It is an interprime number because it is at equal distance from previous prime (2013011213) and next prime (2013011227).

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 = 2013011196 and 2013011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013011227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33447 + ... + 71726.

It is an arithmetic number, because the mean of its divisors is an integer number (66259620).

Almost surely, 2^2013011220 is an apocalyptic number.

2013011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2013011220 is an abundant number, since it is smaller than the sum of its proper divisors (4347912300).

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

2013011220 is a wasteful number, since it uses less digits than its factorization.

2013011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105225 (or 105223 counting only the distinct ones).

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

The square root of 2013011220 is about 44866.5935858741. The cubic root of 2013011220 is about 1262.6473313666.

Adding to 2013011220 its reverse (221103102), we get a palindrome (2234114322).

The spelling of 2013011220 in words is "two billion, thirteen million, eleven thousand, two hundred twenty".