11213115500 has 24 divisors (see below), whose sum is σ = 24489445344. Its totient is φ = 4485246000.

The previous prime is 11213115479. The next prime is 11213115523. The reversal of 11213115500 is 551131211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11212616 + ... + 11213615.

It is an arithmetic number, because the mean of its divisors is an integer number (1020393556).

Almost surely, 2^11213115500 is an apocalyptic number.

11213115500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11213115500 is an abundant number, since it is smaller than the sum of its proper divisors (13276329844).

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

11213115500 is a wasteful number, since it uses less digits than its factorization.

11213115500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22426250 (or 22426238 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 11213115500 its reverse (551131211), we get a palindrome (11764246711).

The spelling of 11213115500 in words is "eleven billion, two hundred thirteen million, one hundred fifteen thousand, five hundred".