12215530211 has 2 divisors, whose sum is σ = 12215530212. Its totient is φ = 12215530210.

The previous prime is 12215530169. The next prime is 12215530213. The reversal of 12215530211 is 11203551221.

It is a strong prime.

It is an emirp because it is prime and its reverse (11203551221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12215530211 is a prime.

Together with 12215530213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12215530213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107765105 + 6107765106.

It is an arithmetic number, because the mean of its divisors is an integer number (6107765106).

Almost surely, 2^12215530211 is an apocalyptic number.

12215530211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215530211 is an equidigital number, since it uses as much as digits as its factorization.

12215530211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 12215530211 in words is "twelve billion, two hundred fifteen million, five hundred thirty thousand, two hundred eleven".