21410143021 has 2 divisors, whose sum is σ = 21410143022. Its totient is φ = 21410143020.

The previous prime is 21410142973. The next prime is 21410143033. The reversal of 21410143021 is 12034101412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19940264100 + 1469878921 = 141210^2 + 38339^2 .

It is a cyclic number.

It is not a de Polignac number, because 21410143021 - 2¹³ = 21410134829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21410143021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21410143061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705071510 + 10705071511.

It is an arithmetic number, because the mean of its divisors is an integer number (10705071511).

Almost surely, 2^21410143021 is an apocalyptic number.

It is an amenable number.

21410143021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21410143021 is an equidigital number, since it uses as much as digits as its factorization.

21410143021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21410143021 its reverse (12034101412), we get a palindrome (33444244433).

The spelling of 21410143021 in words is "twenty-one billion, four hundred ten million, one hundred forty-three thousand, twenty-one".