21000022163 has 2 divisors, whose sum is σ = 21000022164. Its totient is φ = 21000022162.

The previous prime is 21000022151. The next prime is 21000022207. The reversal of 21000022163 is 36122000012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000022163 - 2⁸ = 21000021907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21000022133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011081 + 10500011082.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011082).

Almost surely, 2^21000022163 is an apocalyptic number.

21000022163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000022163 is an equidigital number, since it uses as much as digits as its factorization.

21000022163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000022163 its reverse (36122000012), we get a palindrome (57122022175).

The spelling of 21000022163 in words is "twenty-one billion, twenty-two thousand, one hundred sixty-three".