11221313020 has 12 divisors (see below), whose sum is σ = 23564757384. Its totient is φ = 4488525200.

The previous prime is 11221312987. The next prime is 11221313039. The reversal of 11221313020 is 2031312211.

It is a junction number, because it is equal to n+sod(n) for n = 11221312985 and 11221313003.

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, 280532806 + ... + 280532845.

It is an arithmetic number, because the mean of its divisors is an integer number (1963729782).

Almost surely, 2^11221313020 is an apocalyptic number.

11221313020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221313020 is an abundant number, since it is smaller than the sum of its proper divisors (12343444364).

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

11221313020 is a wasteful number, since it uses less digits than its factorization.

11221313020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561065660 (or 561065658 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11221313020 its reverse (2031312211), we get a palindrome (13252625231).

The spelling of 11221313020 in words is "eleven billion, two hundred twenty-one million, three hundred thirteen thousand, twenty".