21201022699 has 2 divisors, whose sum is σ = 21201022700. Its totient is φ = 21201022698.

The previous prime is 21201022691. The next prime is 21201022751. The reversal of 21201022699 is 99622010212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201022699 - 2³ = 21201022691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201022691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600511349 + 10600511350.

It is an arithmetic number, because the mean of its divisors is an integer number (10600511350).

Almost surely, 2^21201022699 is an apocalyptic number.

21201022699 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201022699 is an equidigital number, since it uses as much as digits as its factorization.

21201022699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 21201022699 in words is "twenty-one billion, two hundred one million, twenty-two thousand, six hundred ninety-nine".