21124032242431 has 2 divisors, whose sum is σ = 21124032242432. Its totient is φ = 21124032242430.

The previous prime is 21124032242413. The next prime is 21124032242447. The reversal of 21124032242431 is 13424223042112.

Together with previous prime (21124032242413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21124032242431 - 2¹¹ = 21124032240383 is a prime.

It is a super-2 number, since 2×21124032242431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21124032242393 and 21124032242402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21124032222431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562016121215 + 10562016121216.

It is an arithmetic number, because the mean of its divisors is an integer number (10562016121216).

Almost surely, 2^{21124032242431} is an apocalyptic number.

21124032242431 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124032242431 is an equidigital number, since it uses as much as digits as its factorization.

21124032242431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21124032242431 its reverse (13424223042112), we get a palindrome (34548255284543).

The spelling of 21124032242431 in words is "twenty-one trillion, one hundred twenty-four billion, thirty-two million, two hundred forty-two thousand, four hundred thirty-one".