11013221020 has 48 divisors (see below), whose sum is σ = 23217340608. Its totient is φ = 4388267520.

The previous prime is 11013220991. The next prime is 11013221033. The reversal of 11013221020 is 2012231011.

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, 10075594 + ... + 10076686.

It is an arithmetic number, because the mean of its divisors is an integer number (483694596).

Almost surely, 2^11013221020 is an apocalyptic number.

11013221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11013221020 is an abundant number, since it is smaller than the sum of its proper divisors (12204119588).

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

11013221020 is a wasteful number, since it uses less digits than its factorization.

11013221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11013221020 its reverse (2012231011), we get a palindrome (13025452031).

Subtracting from 11013221020 its reverse (2012231011), we obtain a palindrome (9000990009).

The spelling of 11013221020 in words is "eleven billion, thirteen million, two hundred twenty-one thousand, twenty".