21335300143 has 2 divisors, whose sum is σ = 21335300144. Its totient is φ = 21335300142.

The previous prime is 21335300137. The next prime is 21335300167. The reversal of 21335300143 is 34100353312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21335300143 - 2⁵ = 21335300111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21335300113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667650071 + 10667650072.

It is an arithmetic number, because the mean of its divisors is an integer number (10667650072).

Almost surely, 2^21335300143 is an apocalyptic number.

21335300143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335300143 is an equidigital number, since it uses as much as digits as its factorization.

21335300143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21335300143 its reverse (34100353312), we get a palindrome (55435653455).

The spelling of 21335300143 in words is "twenty-one billion, three hundred thirty-five million, three hundred thousand, one hundred forty-three".