11220320420 has 72 divisors (see below), whose sum is σ = 25670792448. Its totient is φ = 4114670400.

The previous prime is 11220320407. The next prime is 11220320453. The reversal of 11220320420 is 2402302211.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198755 + ... + 248885.

It is an arithmetic number, because the mean of its divisors is an integer number (356538784).

Almost surely, 2^11220320420 is an apocalyptic number.

11220320420 is a gapful number since it is divisible by the number (10) 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 11220320420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12835396224).

11220320420 is an abundant number, since it is smaller than the sum of its proper divisors (14450472028).

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

11220320420 is a wasteful number, since it uses less digits than its factorization.

11220320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50209 (or 50188 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 11220320420 its reverse (2402302211), we get a palindrome (13622622631).

The spelling of 11220320420 in words is "eleven billion, two hundred twenty million, three hundred twenty thousand, four hundred twenty".