12212333261 has 2 divisors, whose sum is σ = 12212333262. Its totient is φ = 12212333260.

The previous prime is 12212333251. The next prime is 12212333311. The reversal of 12212333261 is 16233321221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12119808100 + 92525161 = 110090^2 + 9619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212333261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12212333261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212333251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106166630 + 6106166631.

It is an arithmetic number, because the mean of its divisors is an integer number (6106166631).

Almost surely, 2^12212333261 is an apocalyptic number.

It is an amenable number.

12212333261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212333261 is an equidigital number, since it uses as much as digits as its factorization.

12212333261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

Adding to 12212333261 its reverse (16233321221), we get a palindrome (28445654482).

The spelling of 12212333261 in words is "twelve billion, two hundred twelve million, three hundred thirty-three thousand, two hundred sixty-one".