21220230213211 has 2 divisors, whose sum is σ = 21220230213212. Its totient is φ = 21220230213210.

The previous prime is 21220230213163. The next prime is 21220230213257. The reversal of 21220230213211 is 11231203202212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220230213211 - 2²³ = 21220221824603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220230213011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610115106605 + 10610115106606.

It is an arithmetic number, because the mean of its divisors is an integer number (10610115106606).

Almost surely, 2^{21220230213211} is an apocalyptic number.

21220230213211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220230213211 is an equidigital number, since it uses as much as digits as its factorization.

21220230213211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21220230213211 its reverse (11231203202212), we get a palindrome (32451433415423).

The spelling of 21220230213211 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirty million, two hundred thirteen thousand, two hundred eleven".