22211043221 has 2 divisors, whose sum is σ = 22211043222. Its totient is φ = 22211043220.

The previous prime is 22211043203. The next prime is 22211043223. The reversal of 22211043221 is 12234011222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20888920900 + 1322122321 = 144530^2 + 36361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211043221 - 2¹⁰ = 22211042197 is a prime.

Together with 22211043223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22211043193 and 22211043202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211043223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105521610 + 11105521611.

It is an arithmetic number, because the mean of its divisors is an integer number (11105521611).

Almost surely, 2^22211043221 is an apocalyptic number.

It is an amenable number.

22211043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211043221 is an equidigital number, since it uses as much as digits as its factorization.

22211043221 is an evil number, because the sum of its binary digits is even.

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

Adding to 22211043221 its reverse (12234011222), we get a palindrome (34445054443).

The spelling of 22211043221 in words is "twenty-two billion, two hundred eleven million, forty-three thousand, two hundred twenty-one".