13220111243 has 2 divisors, whose sum is σ = 13220111244. Its totient is φ = 13220111242.

The previous prime is 13220111239. The next prime is 13220111249. The reversal of 13220111243 is 34211102231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13220111243 - 2² = 13220111239 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220111249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610055621 + 6610055622.

It is an arithmetic number, because the mean of its divisors is an integer number (6610055622).

Almost surely, 2^13220111243 is an apocalyptic number.

13220111243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220111243 is an equidigital number, since it uses as much as digits as its factorization.

13220111243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13220111243 its reverse (34211102231), we get a palindrome (47431213474).

The spelling of 13220111243 in words is "thirteen billion, two hundred twenty million, one hundred eleven thousand, two hundred forty-three".