21021122299 has 2 divisors, whose sum is σ = 21021122300. Its totient is φ = 21021122298.

The previous prime is 21021122293. The next prime is 21021122357. The reversal of 21021122299 is 99222112012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021122299 - 2¹¹ = 21021120251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21021122299.

It is not a weakly prime, because it can be changed into another prime (21021122293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510561149 + 10510561150.

It is an arithmetic number, because the mean of its divisors is an integer number (10510561150).

Almost surely, 2^21021122299 is an apocalyptic number.

21021122299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021122299 is an equidigital number, since it uses as much as digits as its factorization.

21021122299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21021122299 in words is "twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred ninety-nine".