12511501205 has 16 divisors (see below), whose sum is σ = 17162160384. Its totient is φ = 8577550080.

The previous prime is 12511501187. The next prime is 12511501213. The reversal of 12511501205 is 50210511521.

It is not a de Polignac number, because 12511501205 - 2¹⁸ = 12511239061 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 149000 + ... + 217310.

It is an arithmetic number, because the mean of its divisors is an integer number (1072635024).

Almost surely, 2^12511501205 is an apocalyptic number.

It is an amenable number.

12511501205 is a deficient number, since it is larger than the sum of its proper divisors (4650659179).

12511501205 is an equidigital number, since it uses as much as digits as its factorization.

12511501205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73556.

The product of its (nonzero) digits is 500, while the sum is 23.

The spelling of 12511501205 in words is "twelve billion, five hundred eleven million, five hundred one thousand, two hundred five".