12215442097 has 2 divisors, whose sum is σ = 12215442098. Its totient is φ = 12215442096.

The previous prime is 12215442037. The next prime is 12215442101. The reversal of 12215442097 is 79024451221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11951736976 + 263705121 = 109324^2 + 16239^2 .

It is an emirp because it is prime and its reverse (79024451221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12215442097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12215442037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107721048 + 6107721049.

It is an arithmetic number, because the mean of its divisors is an integer number (6107721049).

Almost surely, 2^12215442097 is an apocalyptic number.

It is an amenable number.

12215442097 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215442097 is an equidigital number, since it uses as much as digits as its factorization.

12215442097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 12215442097 in words is "twelve billion, two hundred fifteen million, four hundred forty-two thousand, ninety-seven".