12011000521 has 12 divisors (see below), whose sum is σ = 13026215232. Its totient is φ = 11069840496.

The previous prime is 12011000483. The next prime is 12011000549. The reversal of 12011000521 is 12500011021.

It is a de Polignac number, because none of the positive numbers 2^k-12011000521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011000581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54420 + ... + 164266.

It is an arithmetic number, because the mean of its divisors is an integer number (1085517936).

Almost surely, 2^12011000521 is an apocalyptic number.

It is an amenable number.

12011000521 is a deficient number, since it is larger than the sum of its proper divisors (1015214711).

12011000521 is a wasteful number, since it uses less digits than its factorization.

12011000521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110520 (or 110507 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 12011000521 its reverse (12500011021), we get a palindrome (24511011542).

The spelling of 12011000521 in words is "twelve billion, eleven million, five hundred twenty-one", and thus it is an aban number.