13220412281 has 2 divisors, whose sum is σ = 13220412282. Its totient is φ = 13220412280.

The previous prime is 13220412229. The next prime is 13220412313. The reversal of 13220412281 is 18221402231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13220400400 + 11881 = 114980^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220412281 - 2⁶ = 13220412217 is a prime.

It is a super-2 number, since 2×13220412281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13220412281.

It is not a weakly prime, because it can be changed into another prime (13220412481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610206140 + 6610206141.

It is an arithmetic number, because the mean of its divisors is an integer number (6610206141).

Almost surely, 2^13220412281 is an apocalyptic number.

It is an amenable number.

13220412281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220412281 is an equidigital number, since it uses as much as digits as its factorization.

13220412281 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 13220412281 in words is "thirteen billion, two hundred twenty million, four hundred twelve thousand, two hundred eighty-one".