11220333221 has 2 divisors, whose sum is σ = 11220333222. Its totient is φ = 11220333220.

The previous prime is 11220333209. The next prime is 11220333277. The reversal of 11220333221 is 12233302211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11166148900 + 54184321 = 105670^2 + 7361^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220333221 - 2¹⁴ = 11220316837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220333193 and 11220333202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220333521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610166610 + 5610166611.

It is an arithmetic number, because the mean of its divisors is an integer number (5610166611).

Almost surely, 2^11220333221 is an apocalyptic number.

It is an amenable number.

11220333221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220333221 is an equidigital number, since it uses as much as digits as its factorization.

11220333221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 11220333221 its reverse (12233302211), we get a palindrome (23453635432).

The spelling of 11220333221 in words is "eleven billion, two hundred twenty million, three hundred thirty-three thousand, two hundred twenty-one".