13124124421 has 2 divisors, whose sum is σ = 13124124422. Its totient is φ = 13124124420.

The previous prime is 13124124413. The next prime is 13124124451. The reversal of 13124124421 is 12442142131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11403036225 + 1721088196 = 106785^2 + 41486^2 .

It is a cyclic number.

It is not a de Polignac number, because 13124124421 - 2³ = 13124124413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13124124451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562062210 + 6562062211.

It is an arithmetic number, because the mean of its divisors is an integer number (6562062211).

Almost surely, 2^13124124421 is an apocalyptic number.

It is an amenable number.

13124124421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13124124421 is an equidigital number, since it uses as much as digits as its factorization.

13124124421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

Adding to 13124124421 its reverse (12442142131), we get a palindrome (25566266552).

The spelling of 13124124421 in words is "thirteen billion, one hundred twenty-four million, one hundred twenty-four thousand, four hundred twenty-one".