21222201220009 has 2 divisors, whose sum is σ = 21222201220010. Its totient is φ = 21222201220008.

The previous prime is 21222201220007. The next prime is 21222201220019. The reversal of 21222201220009 is 90002210222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20884872580009 + 337328640000 = 4569997^2 + 580800^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222201220009 - 2¹ = 21222201220007 is a prime.

Together with 21222201220007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21222201220007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611100610004 + 10611100610005.

It is an arithmetic number, because the mean of its divisors is an integer number (10611100610005).

Almost surely, 2^{21222201220009} is an apocalyptic number.

It is an amenable number.

21222201220009 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222201220009 is an equidigital number, since it uses as much as digits as its factorization.

21222201220009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 21222201220009 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty thousand, nine".