13124421643 has 2 divisors, whose sum is σ = 13124421644. Its totient is φ = 13124421642.

The previous prime is 13124421619. The next prime is 13124421659. The reversal of 13124421643 is 34612442131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13124421643 - 2⁹ = 13124421131 is a prime.

It is not a weakly prime, because it can be changed into another prime (13124428643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562210821 + 6562210822.

It is an arithmetic number, because the mean of its divisors is an integer number (6562210822).

Almost surely, 2^13124421643 is an apocalyptic number.

13124421643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13124421643 is an equidigital number, since it uses as much as digits as its factorization.

13124421643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

Adding to 13124421643 its reverse (34612442131), we get a palindrome (47736863774).

The spelling of 13124421643 in words is "thirteen billion, one hundred twenty-four million, four hundred twenty-one thousand, six hundred forty-three".