2243020211221 has 2 divisors, whose sum is σ = 2243020211222. Its totient is φ = 2243020211220.

The previous prime is 2243020211149. The next prime is 2243020211281. The reversal of 2243020211221 is 1221120203422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2242880640625 + 139570596 = 1497625^2 + 11814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243020211221 - 2¹⁹ = 2243019686933 is a prime.

It is a super-2 number, since 2×2243020211221² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2243020211192 and 2243020211201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2243020211281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121510105610 + 1121510105611.

It is an arithmetic number, because the mean of its divisors is an integer number (1121510105611).

Almost surely, 2^{2243020211221} is an apocalyptic number.

It is an amenable number.

2243020211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243020211221 is an equidigital number, since it uses as much as digits as its factorization.

2243020211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2243020211221 its reverse (1221120203422), we get a palindrome (3464140414643).

The spelling of 2243020211221 in words is "two trillion, two hundred forty-three billion, twenty million, two hundred eleven thousand, two hundred twenty-one".