21022002871 has 2 divisors, whose sum is σ = 21022002872. Its totient is φ = 21022002870.

The previous prime is 21022002767. The next prime is 21022002877. The reversal of 21022002871 is 17820022012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022002871 - 2¹¹ = 21022000823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022002877) 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, 10511001435 + 10511001436.

It is an arithmetic number, because the mean of its divisors is an integer number (10511001436).

Almost surely, 2^21022002871 is an apocalyptic number.

21022002871 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022002871 is an equidigital number, since it uses as much as digits as its factorization.

21022002871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 21022002871 its reverse (17820022012), we get a palindrome (38842024883).

The spelling of 21022002871 in words is "twenty-one billion, twenty-two million, two thousand, eight hundred seventy-one".