21022000291 has 2 divisors, whose sum is σ = 21022000292. Its totient is φ = 21022000290.

The previous prime is 21022000289. The next prime is 21022000319. The reversal of 21022000291 is 19200022012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022000291 - 2¹ = 21022000289 is a prime.

Together with 21022000289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21022000091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511000145 + 10511000146.

It is an arithmetic number, because the mean of its divisors is an integer number (10511000146).

Almost surely, 2^21022000291 is an apocalyptic number.

21022000291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022000291 is an equidigital number, since it uses as much as digits as its factorization.

21022000291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21022000291 in words is "twenty-one billion, twenty-two million, two hundred ninety-one", and thus it is an aban number.