21202220012213 has 2 divisors, whose sum is σ = 21202220012214. Its totient is φ = 21202220012212.

The previous prime is 21202220012173. The next prime is 21202220012251. The reversal of 21202220012213 is 31221002220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15938283629284 + 5263936382929 = 3992278^2 + 2294327^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202220012213 - 2¹⁴ = 21202219995829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202220002213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601110006106 + 10601110006107.

It is an arithmetic number, because the mean of its divisors is an integer number (10601110006107).

Almost surely, 2^{21202220012213} is an apocalyptic number.

It is an amenable number.

21202220012213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202220012213 is an equidigital number, since it uses as much as digits as its factorization.

21202220012213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21202220012213 its reverse (31221002220212), we get a palindrome (52423222232425).

The spelling of 21202220012213 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, twelve thousand, two hundred thirteen".