12011550500 has 48 divisors (see below), whose sum is σ = 26942273904. Its totient is φ = 4674758400.

The previous prime is 12011550493. The next prime is 12011550553. The reversal of 12011550500 is 505511021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5460914404 + 6550636096 = 73898^2 + 80936^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306137 + ... + 343136.

It is an arithmetic number, because the mean of its divisors is an integer number (561297373).

Almost surely, 2^12011550500 is an apocalyptic number.

12011550500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011550500 is an abundant number, since it is smaller than the sum of its proper divisors (14930723404).

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

12011550500 is a wasteful number, since it uses less digits than its factorization.

12011550500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649329 (or 649317 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The spelling of 12011550500 in words is "twelve billion, eleven million, five hundred fifty thousand, five hundred".