21220213213307 has 2 divisors, whose sum is σ = 21220213213308. Its totient is φ = 21220213213306.

The previous prime is 21220213213291. The next prime is 21220213213337. The reversal of 21220213213307 is 70331231202212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220213213307 - 2⁴ = 21220213213291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21220213213307.

It is not a weakly prime, because it can be changed into another prime (21220213213337) 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, 10610106606653 + 10610106606654.

It is an arithmetic number, because the mean of its divisors is an integer number (10610106606654).

Almost surely, 2^{21220213213307} is an apocalyptic number.

21220213213307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220213213307 is an equidigital number, since it uses as much as digits as its factorization.

21220213213307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

Adding to 21220213213307 its reverse (70331231202212), we get a palindrome (91551444415519).

The spelling of 21220213213307 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirteen million, two hundred thirteen thousand, three hundred seven".