12365221373 has 4 divisors (see below), whose sum is σ = 12492697980. Its totient is φ = 12237744768.

The previous prime is 12365221369. The next prime is 12365221403. The reversal of 12365221373 is 37312256321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37312256321 = 2437 ⋅15310733.

It can be written as a sum of positive squares in 2 ways, for example, as 2226141124 + 10139080249 = 47182^2 + 100693^2 .

It is a cyclic number.

It is not a de Polignac number, because 12365221373 - 2² = 12365221369 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 (12365221313) 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, 63738158 + ... + 63738351.

It is an arithmetic number, because the mean of its divisors is an integer number (3123174495).

Almost surely, 2^12365221373 is an apocalyptic number.

It is an amenable number.

12365221373 is a deficient number, since it is larger than the sum of its proper divisors (127476607).

12365221373 is an equidigital number, since it uses as much as digits as its factorization.

12365221373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127476606.

The product of its digits is 45360, while the sum is 35.

Adding to 12365221373 its reverse (37312256321), we get a palindrome (49677477694).

The spelling of 12365221373 in words is "twelve billion, three hundred sixty-five million, two hundred twenty-one thousand, three hundred seventy-three".