12900001185 has 24 divisors (see below), whose sum is σ = 22666309224. Its totient is φ = 6785752320.

The previous prime is 12900001181. The next prime is 12900001223. The reversal of 12900001185 is 58110000921.

It can be written as a sum of positive squares in 4 ways, for example, as 266256 + 12899734929 = 516^2 + 113577^2 .

It is not a de Polignac number, because 12900001185 - 2² = 12900001181 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12900001181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1960186 + ... + 1966755.

It is an arithmetic number, because the mean of its divisors is an integer number (944429551).

Almost surely, 2^12900001185 is an apocalyptic number.

12900001185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12900001185 is a deficient number, since it is larger than the sum of its proper divisors (9766308039).

12900001185 is a wasteful number, since it uses less digits than its factorization.

12900001185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927025 (or 3927022 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The spelling of 12900001185 in words is "twelve billion, nine hundred million, one thousand, one hundred eighty-five".