11219208520 has 32 divisors (see below), whose sum is σ = 27185006520. Its totient is φ = 4142476800.

The previous prime is 11219208499. The next prime is 11219208523. The reversal of 11219208520 is 2580291211.

It can be written as a sum of positive squares in 4 ways, for example, as 3309240676 + 7909967844 = 57526^2 + 88938^2 .

It is not an unprimeable number, because it can be changed into a prime (11219208523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10787181 + ... + 10788220.

Almost surely, 2^11219208520 is an apocalyptic number.

11219208520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11219208520 is an abundant number, since it is smaller than the sum of its proper divisors (15965798000).

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

11219208520 is a wasteful number, since it uses less digits than its factorization.

11219208520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21575425 (or 21575421 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

Adding to 11219208520 its reverse (2580291211), we get a palindrome (13799499731).

The spelling of 11219208520 in words is "eleven billion, two hundred nineteen million, two hundred eight thousand, five hundred twenty".