12004055551 has 4 divisors (see below), whose sum is σ = 12008425000. Its totient is φ = 11999686104.

The previous prime is 12004055549. The next prime is 12004055561. The reversal of 12004055551 is 15555040021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15555040021 = 251 ⋅61972271.

It is a cyclic number.

It is not a de Polignac number, because 12004055551 - 2¹ = 12004055549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004055501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2180601 + ... + 2186098.

It is an arithmetic number, because the mean of its divisors is an integer number (3002106250).

Almost surely, 2^12004055551 is an apocalyptic number.

12004055551 is a deficient number, since it is larger than the sum of its proper divisors (4369449).

12004055551 is an equidigital number, since it uses as much as digits as its factorization.

12004055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369448.

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 12004055551 its reverse (15555040021), we get a palindrome (27559095572).

The spelling of 12004055551 in words is "twelve billion, four million, fifty-five thousand, five hundred fifty-one".