11321106221 has 2 divisors, whose sum is σ = 11321106222. Its totient is φ = 11321106220.

The previous prime is 11321106211. The next prime is 11321106227. The reversal of 11321106221 is 12260112311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6583537321 + 4737568900 = 81139^2 + 68830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321106221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11321106193 and 11321106202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321106227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660553110 + 5660553111.

It is an arithmetic number, because the mean of its divisors is an integer number (5660553111).

Almost surely, 2^11321106221 is an apocalyptic number.

It is an amenable number.

11321106221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321106221 is an equidigital number, since it uses as much as digits as its factorization.

11321106221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11321106221 its reverse (12260112311), we get a palindrome (23581218532).

The spelling of 11321106221 in words is "eleven billion, three hundred twenty-one million, one hundred six thousand, two hundred twenty-one".