11011322221 has 2 divisors, whose sum is σ = 11011322222. Its totient is φ = 11011322220.

The previous prime is 11011322213. The next prime is 11011322227. The reversal of 11011322221 is 12222311011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7472738025 + 3538584196 = 86445^2 + 59486^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011322221 - 2³ = 11011322213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011322195 and 11011322204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011322227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505661110 + 5505661111.

It is an arithmetic number, because the mean of its divisors is an integer number (5505661111).

Almost surely, 2^11011322221 is an apocalyptic number.

It is an amenable number.

11011322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011322221 is an equidigital number, since it uses as much as digits as its factorization.

11011322221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11011322221 its reverse (12222311011), we get a palindrome (23233633232).

The spelling of 11011322221 in words is "eleven billion, eleven million, three hundred twenty-two thousand, two hundred twenty-one".