21222223210207 has 2 divisors, whose sum is σ = 21222223210208. Its totient is φ = 21222223210206.

The previous prime is 21222223210157. The next prime is 21222223210231. The reversal of 21222223210207 is 70201232222212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222223210207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222223210267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611111605103 + 10611111605104.

It is an arithmetic number, because the mean of its divisors is an integer number (10611111605104).

Almost surely, 2^{21222223210207} is an apocalyptic number.

21222223210207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222223210207 is an equidigital number, since it uses as much as digits as its factorization.

21222223210207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 21222223210207 its reverse (70201232222212), we get a palindrome (91423455432419).

The spelling of 21222223210207 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-three million, two hundred ten thousand, two hundred seven".