12011551055 has 24 divisors (see below), whose sum is σ = 17220323808. Its totient is φ = 8013878208.

The previous prime is 12011551039. The next prime is 12011551091. The reversal of 12011551055 is 55015511021.

It is not a de Polignac number, because 12011551055 - 2⁴ = 12011551039 is a prime.

It is a super-2 number, since 2×12011551055² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653459 + ... + 671588.

It is an arithmetic number, because the mean of its divisors is an integer number (717513492).

Almost surely, 2^12011551055 is an apocalyptic number.

12011551055 is a deficient number, since it is larger than the sum of its proper divisors (5208772753).

12011551055 is a wasteful number, since it uses less digits than its factorization.

12011551055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325103 (or 1325096 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 26.

The spelling of 12011551055 in words is "twelve billion, eleven million, five hundred fifty-one thousand, fifty-five".