12215220133 has 2 divisors, whose sum is σ = 12215220134. Its totient is φ = 12215220132.

The previous prime is 12215220041. The next prime is 12215220139. The reversal of 12215220133 is 33102251221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8821342084 + 3393878049 = 93922^2 + 58257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12215220133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12215220139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107610066 + 6107610067.

It is an arithmetic number, because the mean of its divisors is an integer number (6107610067).

Almost surely, 2^12215220133 is an apocalyptic number.

It is an amenable number.

12215220133 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215220133 is an equidigital number, since it uses as much as digits as its factorization.

12215220133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 12215220133 its reverse (33102251221), we get a palindrome (45317471354).

The spelling of 12215220133 in words is "twelve billion, two hundred fifteen million, two hundred twenty thousand, one hundred thirty-three".