12215220187 has 2 divisors, whose sum is σ = 12215220188. Its totient is φ = 12215220186.

The previous prime is 12215220161. The next prime is 12215220203. The reversal of 12215220187 is 78102251221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12215220187 - 2¹¹ = 12215218139 is a prime.

It is not a weakly prime, because it can be changed into another prime (12215227187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107610093 + 6107610094.

It is an arithmetic number, because the mean of its divisors is an integer number (6107610094).

Almost surely, 2^12215220187 is an apocalyptic number.

12215220187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215220187 is an equidigital number, since it uses as much as digits as its factorization.

12215220187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 31.

The spelling of 12215220187 in words is "twelve billion, two hundred fifteen million, two hundred twenty thousand, one hundred eighty-seven".