11131230550 has 24 divisors (see below), whose sum is σ = 22586279832. Its totient is φ = 4047720000.

The previous prime is 11131230533. The next prime is 11131230569. The reversal of 11131230550 is 5503213111.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10118751 + ... + 10119850.

It is an arithmetic number, because the mean of its divisors is an integer number (941094993).

Almost surely, 2^11131230550 is an apocalyptic number.

11131230550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11131230550 is an abundant number, since it is smaller than the sum of its proper divisors (11455049282).

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

11131230550 is a wasteful number, since it uses less digits than its factorization.

11131230550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20238624 (or 20238619 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 11131230550 its reverse (5503213111), we get a palindrome (16634443661).

The spelling of 11131230550 in words is "eleven billion, one hundred thirty-one million, two hundred thirty thousand, five hundred fifty".