13220216237 has 2 divisors, whose sum is σ = 13220216238. Its totient is φ = 13220216236.

The previous prime is 13220216213. The next prime is 13220216239. The reversal of 13220216237 is 73261202231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13220170441 + 45796 = 114979^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220216237 - 2¹⁰ = 13220215213 is a prime.

Together with 13220216239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220216239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610108118 + 6610108119.

It is an arithmetic number, because the mean of its divisors is an integer number (6610108119).

Almost surely, 2^13220216237 is an apocalyptic number.

It is an amenable number.

13220216237 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220216237 is an equidigital number, since it uses as much as digits as its factorization.

13220216237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 13220216237 its reverse (73261202231), we get a palindrome (86481418468).

The spelling of 13220216237 in words is "thirteen billion, two hundred twenty million, two hundred sixteen thousand, two hundred thirty-seven".