12185042572061 has 4 divisors (see below), whose sum is σ = 12213183548412. Its totient is φ = 12156901595712.

The previous prime is 12185042571979. The next prime is 12185042572067. The reversal of 12185042572061 is 16027524058121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5811083963161 + 6373958608900 = 2410619^2 + 2524670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12185042572061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185042572067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14070487526 + ... + 14070488391.

It is an arithmetic number, because the mean of its divisors is an integer number (3053295887103).

Almost surely, 2^{12185042572061} is an apocalyptic number.

It is an amenable number.

12185042572061 is a deficient number, since it is larger than the sum of its proper divisors (28140976351).

12185042572061 is an equidigital number, since it uses as much as digits as its factorization.

12185042572061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28140976350.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 12185042572061 in words is "twelve trillion, one hundred eighty-five billion, forty-two million, five hundred seventy-two thousand, sixty-one".