2013221020 has 12 divisors (see below), whose sum is σ = 4227764184. Its totient is φ = 805288400.

The previous prime is 2013221011. The next prime is 2013221053. The reversal of 2013221020 is 201223102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50330506 + ... + 50330545.

It is an arithmetic number, because the mean of its divisors is an integer number (352313682).

Almost surely, 2^2013221020 is an apocalyptic number.

2013221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2013221020 is an abundant number, since it is smaller than the sum of its proper divisors (2214543164).

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

2013221020 is a wasteful number, since it uses less digits than its factorization.

2013221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100661060 (or 100661058 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2013221020 is about 44868.9315673997. The cubic root of 2013221020 is about 1262.6911950413.

Adding to 2013221020 its reverse (201223102), we get a palindrome (2214444122).

The spelling of 2013221020 in words is "two billion, thirteen million, two hundred twenty-one thousand, twenty".