21331322143 has 2 divisors, whose sum is σ = 21331322144. Its totient is φ = 21331322142.

The previous prime is 21331322113. The next prime is 21331322179. The reversal of 21331322143 is 34122313312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21331322143 - 2³³ = 12741387551 is a prime.

It is a super-2 number, since 2×21331322143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331322113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665661071 + 10665661072.

It is an arithmetic number, because the mean of its divisors is an integer number (10665661072).

Almost surely, 2^21331322143 is an apocalyptic number.

21331322143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331322143 is an equidigital number, since it uses as much as digits as its factorization.

21331322143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

Adding to 21331322143 its reverse (34122313312), we get a palindrome (55453635455).

The spelling of 21331322143 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, one hundred forty-three".