12423919217 has 2 divisors, whose sum is σ = 12423919218. Its totient is φ = 12423919216.

The previous prime is 12423919187. The next prime is 12423919231. The reversal of 12423919217 is 71291932421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11915687281 + 508231936 = 109159^2 + 22544^2 .

It is an emirp because it is prime and its reverse (71291932421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12423919217 - 2⁶ = 12423919153 is a prime.

It is not a weakly prime, because it can be changed into another prime (12423919267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211959608 + 6211959609.

It is an arithmetic number, because the mean of its divisors is an integer number (6211959609).

Almost surely, 2^12423919217 is an apocalyptic number.

It is an amenable number.

12423919217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12423919217 is an equidigital number, since it uses as much as digits as its factorization.

12423919217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The spelling of 12423919217 in words is "twelve billion, four hundred twenty-three million, nine hundred nineteen thousand, two hundred seventeen".