1322013221 has 2 divisors, whose sum is σ = 1322013222. Its totient is φ = 1322013220.

The previous prime is 1322013193. The next prime is 1322013229. The reversal of 1322013221 is 1223102231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1088076196 + 233937025 = 32986^2 + 15295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322013221 - 2¹⁸ = 1321751077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1322013221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322013229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661006610 + 661006611.

It is an arithmetic number, because the mean of its divisors is an integer number (661006611).

Almost surely, 2^1322013221 is an apocalyptic number.

It is an amenable number.

1322013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322013221 is an equidigital number, since it uses as much as digits as its factorization.

1322013221 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 17.

The square root of 1322013221 is about 36359.4997352824. The cubic root of 1322013221 is about 1097.5187104252.

Adding to 1322013221 its reverse (1223102231), we get a palindrome (2545115452).

The spelling of 1322013221 in words is "one billion, three hundred twenty-two million, thirteen thousand, two hundred twenty-one".