12321166625 has 8 divisors (see below), whose sum is σ = 15376816104. Its totient is φ = 9856933200.

The previous prime is 12321166567. The next prime is 12321166681. The reversal of 12321166625 is 52666112321.

It can be written as a sum of positive squares in 4 ways, for example, as 1206103441 + 11115063184 = 34729^2 + 105428^2 .

It is not a de Polignac number, because 12321166625 - 2⁸ = 12321166369 is a prime.

It is a super-2 number, since 2×12321166625² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49284542 + ... + 49284791.

It is an arithmetic number, because the mean of its divisors is an integer number (1922102013).

Almost surely, 2^12321166625 is an apocalyptic number.

It is an amenable number.

12321166625 is a deficient number, since it is larger than the sum of its proper divisors (3055649479).

12321166625 is an frugal number, since it uses more digits than its factorization.

12321166625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98569348 (or 98569338 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

Adding to 12321166625 its reverse (52666112321), we get a palindrome (64987278946).

The spelling of 12321166625 in words is "twelve billion, three hundred twenty-one million, one hundred sixty-six thousand, six hundred twenty-five".