12212243081 has 2 divisors, whose sum is σ = 12212243082. Its totient is φ = 12212243080.

The previous prime is 12212243003. The next prime is 12212243083. The reversal of 12212243081 is 18034221221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10720738681 + 1491504400 = 103541^2 + 38620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212243081 is a prime.

It is a super-2 number, since 2×12212243081² (a number of 21 digits) contains 22 as substring.

Together with 12212243083, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12212243081.

It is not a weakly prime, because it can be changed into another prime (12212243083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106121540 + 6106121541.

It is an arithmetic number, because the mean of its divisors is an integer number (6106121541).

Almost surely, 2^12212243081 is an apocalyptic number.

It is an amenable number.

12212243081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212243081 is an equidigital number, since it uses as much as digits as its factorization.

12212243081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 12212243081 in words is "twelve billion, two hundred twelve million, two hundred forty-three thousand, eighty-one".