13221330222157 has 2 divisors, whose sum is σ = 13221330222158. Its totient is φ = 13221330222156.

The previous prime is 13221330222137. The next prime is 13221330222167. The reversal of 13221330222157 is 75122203312231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11116129455396 + 2105200766761 = 3334086^2 + 1450931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221330222157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221330222137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610665111078 + 6610665111079.

It is an arithmetic number, because the mean of its divisors is an integer number (6610665111079).

Almost surely, 2^{13221330222157} is an apocalyptic number.

It is an amenable number.

13221330222157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221330222157 is an equidigital number, since it uses as much as digits as its factorization.

13221330222157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 13221330222157 its reverse (75122203312231), we get a palindrome (88343533534388).

The spelling of 13221330222157 in words is "thirteen trillion, two hundred twenty-one billion, three hundred thirty million, two hundred twenty-two thousand, one hundred fifty-seven".