12011255720 has 16 divisors (see below), whose sum is σ = 27025325460. Its totient is φ = 4804502272.

The previous prime is 12011255719. The next prime is 12011255743. The reversal of 12011255720 is 2755211021.

It can be written as a sum of positive squares in 2 ways, for example, as 11803953316 + 207302404 = 108646^2 + 14398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12011255720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150140657 + ... + 150140736.

Almost surely, 2^12011255720 is an apocalyptic number.

12011255720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011255720 is an abundant number, since it is smaller than the sum of its proper divisors (15014069740).

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

12011255720 is a wasteful number, since it uses less digits than its factorization.

12011255720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300281404 (or 300281400 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 12011255720 its reverse (2755211021), we get a palindrome (14766466741).

The spelling of 12011255720 in words is "twelve billion, eleven million, two hundred fifty-five thousand, seven hundred twenty".