21264212743 has 2 divisors, whose sum is σ = 21264212744. Its totient is φ = 21264212742.

The previous prime is 21264212737. The next prime is 21264212777. The reversal of 21264212743 is 34721246212.

It is an a-pointer prime, because the next prime (21264212777) can be obtained adding 21264212743 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21264212743 - 2¹³ = 21264204551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21264212699 and 21264212708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21264222743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10632106371 + 10632106372.

It is an arithmetic number, because the mean of its divisors is an integer number (10632106372).

Almost surely, 2^21264212743 is an apocalyptic number.

21264212743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21264212743 is an equidigital number, since it uses as much as digits as its factorization.

21264212743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

Adding to 21264212743 its reverse (34721246212), we get a palindrome (55985458955).

The spelling of 21264212743 in words is "twenty-one billion, two hundred sixty-four million, two hundred twelve thousand, seven hundred forty-three".