12561702123 has 16 divisors (see below), whose sum is σ = 17919488000. Its totient is φ = 7803643680.

The previous prime is 12561702121. The next prime is 12561702133. The reversal of 12561702123 is 32120716521.

It is not a de Polignac number, because 12561702123 - 2¹ = 12561702121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12561702121) 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, 1802923 + ... + 1809876.

It is an arithmetic number, because the mean of its divisors is an integer number (1119968000).

Almost surely, 2^12561702123 is an apocalyptic number.

12561702123 is a deficient number, since it is larger than the sum of its proper divisors (5357785877).

12561702123 is a wasteful number, since it uses less digits than its factorization.

12561702123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612882.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 12561702123 in words is "twelve billion, five hundred sixty-one million, seven hundred two thousand, one hundred twenty-three".