11220001321 has 2 divisors, whose sum is σ = 11220001322. Its totient is φ = 11220001320.

The previous prime is 11220001297. The next prime is 11220001333. The reversal of 11220001321 is 12310002211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10375459600 + 844541721 = 101860^2 + 29061^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220001321 - 2¹⁵ = 11219968553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11220001421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610000660 + 5610000661.

It is an arithmetic number, because the mean of its divisors is an integer number (5610000661).

Almost surely, 2^11220001321 is an apocalyptic number.

It is an amenable number.

11220001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220001321 is an equidigital number, since it uses as much as digits as its factorization.

11220001321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11220001321 its reverse (12310002211), we get a palindrome (23530003532).

The spelling of 11220001321 in words is "eleven billion, two hundred twenty million, one thousand, three hundred twenty-one".