12012546161 has 24 divisors (see below), whose sum is σ = 15302754432. Its totient is φ = 9228542400.

The previous prime is 12012546157. The next prime is 12012546179. The reversal of 12012546161 is 16164521021.

It is not a de Polignac number, because 12012546161 - 2² = 12012546157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12012546101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39740 + ... + 160013.

It is an arithmetic number, because the mean of its divisors is an integer number (637614768).

Almost surely, 2^12012546161 is an apocalyptic number.

12012546161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012546161 is a deficient number, since it is larger than the sum of its proper divisors (3290208271).

12012546161 is a wasteful number, since it uses less digits than its factorization.

12012546161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199853 (or 199842 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 12012546161 in words is "twelve billion, twelve million, five hundred forty-six thousand, one hundred sixty-one".