21213303143 has 2 divisors, whose sum is σ = 21213303144. Its totient is φ = 21213303142.

The previous prime is 21213303127. The next prime is 21213303151. The reversal of 21213303143 is 34130331212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213303143 - 2⁴ = 21213303127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213303113) 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, 10606651571 + 10606651572.

It is an arithmetic number, because the mean of its divisors is an integer number (10606651572).

Almost surely, 2^21213303143 is an apocalyptic number.

21213303143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213303143 is an equidigital number, since it uses as much as digits as its factorization.

21213303143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21213303143 its reverse (34130331212), we get a palindrome (55343634355).

The spelling of 21213303143 in words is "twenty-one billion, two hundred thirteen million, three hundred three thousand, one hundred forty-three".