12005054091 has 16 divisors (see below), whose sum is σ = 17788072320. Its totient is φ = 8002106280.

The previous prime is 12005054071. The next prime is 12005054111. The reversal of 12005054091 is 19045050021.

12005054091 is a `hidden beast` number, since 1 + 200 + 50 + 5 + 409 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12005054071) and next prime (12005054111).

It is not a de Polignac number, because 12005054091 - 2⁹ = 12005053579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12005054041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158596 + ... + 221726.

It is an arithmetic number, because the mean of its divisors is an integer number (1111754520).

Almost surely, 2^12005054091 is an apocalyptic number.

12005054091 is a deficient number, since it is larger than the sum of its proper divisors (5783018229).

12005054091 is an equidigital number, since it uses as much as digits as its factorization.

12005054091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70183 (or 70177 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 12005054091 in words is "twelve billion, five million, fifty-four thousand, ninety-one".