1222111321 has 2 divisors, whose sum is σ = 1222111322. Its totient is φ = 1222111320.

The previous prime is 1222111273. The next prime is 1222111333. The reversal of 1222111321 is 1231112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613255696 + 608855625 = 24764^2 + 24675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222111321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222111295 and 1222111304.

It is not a weakly prime, because it can be changed into another prime (1222111391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611055660 + 611055661.

It is an arithmetic number, because the mean of its divisors is an integer number (611055661).

Almost surely, 2^1222111321 is an apocalyptic number.

It is an amenable number.

1222111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222111321 is an equidigital number, since it uses as much as digits as its factorization.

1222111321 is an evil number, because the sum of its binary digits is even.

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

The square root of 1222111321 is about 34958.7088005264. The cubic root of 1222111321 is about 1069.1457708861.

Adding to 1222111321 its reverse (1231112221), we get a palindrome (2453223542).

The spelling of 1222111321 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, three hundred twenty-one".