12251243964961 has 4 divisors (see below), whose sum is σ = 12254715559300. Its totient is φ = 12247772370624.

The previous prime is 12251243964929. The next prime is 12251243965033. The reversal of 12251243964961 is 16946934215221.

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 1607050613025 + 10644193351936 = 1267695^2 + 3262544^2 .

It is a cyclic number.

It is not a de Polignac number, because 12251243964961 - 2⁵ = 12251243964929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12251243961961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735791876 + ... + 1735798933.

It is an arithmetic number, because the mean of its divisors is an integer number (3063678889825).

Almost surely, 2^{12251243964961} is an apocalyptic number.

It is an amenable number.

12251243964961 is a deficient number, since it is larger than the sum of its proper divisors (3471594339).

12251243964961 is an equidigital number, since it uses as much as digits as its factorization.

12251243964961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471594338.

The product of its digits is 5598720, while the sum is 55.

The spelling of 12251243964961 in words is "twelve trillion, two hundred fifty-one billion, two hundred forty-three million, nine hundred sixty-four thousand, nine hundred sixty-one".