21022112213 has 2 divisors, whose sum is σ = 21022112214. Its totient is φ = 21022112212.

The previous prime is 21022112207. The next prime is 21022112227. The reversal of 21022112213 is 31221122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11893647364 + 9128464849 = 109058^2 + 95543^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022112213 - 2⁴ = 21022112197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022112191 and 21022112200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022112413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511056106 + 10511056107.

It is an arithmetic number, because the mean of its divisors is an integer number (10511056107).

Almost surely, 2^21022112213 is an apocalyptic number.

It is an amenable number.

21022112213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022112213 is an equidigital number, since it uses as much as digits as its factorization.

21022112213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21022112213 its reverse (31221122012), we get a palindrome (52243234225).

The spelling of 21022112213 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred thirteen".