12219421213 has 2 divisors, whose sum is σ = 12219421214. Its totient is φ = 12219421212.

The previous prime is 12219421141. The next prime is 12219421231. The reversal of 12219421213 is 31212491221.

Together with next prime (12219421231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11091670489 + 1127750724 = 105317^2 + 33582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12219421213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12219421283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109710606 + 6109710607.

It is an arithmetic number, because the mean of its divisors is an integer number (6109710607).

Almost surely, 2^12219421213 is an apocalyptic number.

It is an amenable number.

12219421213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12219421213 is an equidigital number, since it uses as much as digits as its factorization.

12219421213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The spelling of 12219421213 in words is "twelve billion, two hundred nineteen million, four hundred twenty-one thousand, two hundred thirteen".