13033222561 has 2 divisors, whose sum is σ = 13033222562. Its totient is φ = 13033222560.

The previous prime is 13033222537. The next prime is 13033222591. The reversal of 13033222561 is 16522233031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11522734336 + 1510488225 = 107344^2 + 38865^2 .

It is a cyclic number.

It is not a de Polignac number, because 13033222561 - 2⁹ = 13033222049 is a prime.

It is not a weakly prime, because it can be changed into another prime (13033222591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6516611280 + 6516611281.

It is an arithmetic number, because the mean of its divisors is an integer number (6516611281).

Almost surely, 2^13033222561 is an apocalyptic number.

It is an amenable number.

13033222561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13033222561 is an equidigital number, since it uses as much as digits as its factorization.

13033222561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 13033222561 its reverse (16522233031), we get a palindrome (29555455592).

The spelling of 13033222561 in words is "thirteen billion, thirty-three million, two hundred twenty-two thousand, five hundred sixty-one".