21222220010207 has 2 divisors, whose sum is σ = 21222220010208. Its totient is φ = 21222220010206.

The previous prime is 21222220010171. The next prime is 21222220010221. The reversal of 21222220010207 is 70201002222212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222220010207 - 2⁶ = 21222220010143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222220010237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611110005103 + 10611110005104.

It is an arithmetic number, because the mean of its divisors is an integer number (10611110005104).

Almost surely, 2^{21222220010207} is an apocalyptic number.

21222220010207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222220010207 is an equidigital number, since it uses as much as digits as its factorization.

21222220010207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 21222220010207 its reverse (70201002222212), we get a palindrome (91423222232419).

The spelling of 21222220010207 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, ten thousand, two hundred seven".