13122230333221 has 2 divisors, whose sum is σ = 13122230333222. Its totient is φ = 13122230333220.

The previous prime is 13122230333213. The next prime is 13122230333279. The reversal of 13122230333221 is 12233303222131.

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., 12166213760100 + 956016573121 = 3488010^2 + 977761^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122230333221 - 2³ = 13122230333213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13122230333221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13122230333281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561115166610 + 6561115166611.

It is an arithmetic number, because the mean of its divisors is an integer number (6561115166611).

Almost surely, 2^{13122230333221} is an apocalyptic number.

It is an amenable number.

13122230333221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122230333221 is an equidigital number, since it uses as much as digits as its factorization.

13122230333221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 13122230333221 its reverse (12233303222131), we get a palindrome (25355533555352).

The spelling of 13122230333221 in words is "thirteen trillion, one hundred twenty-two billion, two hundred thirty million, three hundred thirty-three thousand, two hundred twenty-one".