13221134453 has 2 divisors, whose sum is σ = 13221134454. Its totient is φ = 13221134452.

The previous prime is 13221134411. The next prime is 13221134473. The reversal of 13221134453 is 35443112231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13141871044 + 79263409 = 114638^2 + 8903^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221134453 - 2⁸ = 13221134197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221134473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610567226 + 6610567227.

It is an arithmetic number, because the mean of its divisors is an integer number (6610567227).

Almost surely, 2^13221134453 is an apocalyptic number.

It is an amenable number.

13221134453 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221134453 is an equidigital number, since it uses as much as digits as its factorization.

13221134453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

Adding to 13221134453 its reverse (35443112231), we get a palindrome (48664246684).

The spelling of 13221134453 in words is "thirteen billion, two hundred twenty-one million, one hundred thirty-four thousand, four hundred fifty-three".