21222016352507 has 2 divisors, whose sum is σ = 21222016352508. Its totient is φ = 21222016352506.

The previous prime is 21222016352497. The next prime is 21222016352527. The reversal of 21222016352507 is 70525361022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222016352507 - 2⁴² = 16823969841403 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222016352527) 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, 10611008176253 + 10611008176254.

It is an arithmetic number, because the mean of its divisors is an integer number (10611008176254).

Almost surely, 2^{21222016352507} is an apocalyptic number.

21222016352507 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222016352507 is an equidigital number, since it uses as much as digits as its factorization.

21222016352507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 38.

Adding to 21222016352507 its reverse (70525361022212), we get a palindrome (91747377374719).

The spelling of 21222016352507 in words is "twenty-one trillion, two hundred twenty-two billion, sixteen million, three hundred fifty-two thousand, five hundred seven".