21303032244551 has 2 divisors, whose sum is σ = 21303032244552. Its totient is φ = 21303032244550.

The previous prime is 21303032244401. The next prime is 21303032244577. The reversal of 21303032244551 is 15544223030312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21303032244551 - 2¹⁰ = 21303032243527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303032247551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651516122275 + 10651516122276.

It is an arithmetic number, because the mean of its divisors is an integer number (10651516122276).

Almost surely, 2^{21303032244551} is an apocalyptic number.

21303032244551 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303032244551 is an equidigital number, since it uses as much as digits as its factorization.

21303032244551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21303032244551 its reverse (15544223030312), we get a palindrome (36847255274863).

The spelling of 21303032244551 in words is "twenty-one trillion, three hundred three billion, thirty-two million, two hundred forty-four thousand, five hundred fifty-one".