12215156423 has 2 divisors, whose sum is σ = 12215156424. Its totient is φ = 12215156422.

The previous prime is 12215156419. The next prime is 12215156453. The reversal of 12215156423 is 32465151221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12215156423 - 2² = 12215156419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12215156423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12215156413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107578211 + 6107578212.

It is an arithmetic number, because the mean of its divisors is an integer number (6107578212).

Almost surely, 2^12215156423 is an apocalyptic number.

12215156423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215156423 is an equidigital number, since it uses as much as digits as its factorization.

12215156423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The spelling of 12215156423 in words is "twelve billion, two hundred fifteen million, one hundred fifty-six thousand, four hundred twenty-three".