12651691223 has 2 divisors, whose sum is σ = 12651691224. Its totient is φ = 12651691222.

The previous prime is 12651691219. The next prime is 12651691229. The reversal of 12651691223 is 32219615621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12651691223 - 2² = 12651691219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12651691229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325845611 + 6325845612.

It is an arithmetic number, because the mean of its divisors is an integer number (6325845612).

Almost surely, 2^12651691223 is an apocalyptic number.

12651691223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651691223 is an equidigital number, since it uses as much as digits as its factorization.

12651691223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The spelling of 12651691223 in words is "twelve billion, six hundred fifty-one million, six hundred ninety-one thousand, two hundred twenty-three".