12215530213 has 2 divisors, whose sum is σ = 12215530214. Its totient is φ = 12215530212.

The previous prime is 12215530211. The next prime is 12215530231. The reversal of 12215530213 is 31203551221.

Together with next prime (12215530231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9506640004 + 2708890209 = 97502^2 + 52047^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215530213 - 2¹ = 12215530211 is a prime.

Together with 12215530211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12215530211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107765106 + 6107765107.

It is an arithmetic number, because the mean of its divisors is an integer number (6107765107).

Almost surely, 2^12215530213 is an apocalyptic number.

It is an amenable number.

12215530213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215530213 is an equidigital number, since it uses as much as digits as its factorization.

12215530213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 12215530213 in words is "twelve billion, two hundred fifteen million, five hundred thirty thousand, two hundred thirteen".