1322320421 has 2 divisors, whose sum is σ = 1322320422. Its totient is φ = 1322320420.

The previous prime is 1322320399. The next prime is 1322320457. The reversal of 1322320421 is 1240232231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1316891521 + 5428900 = 36289^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322320421 - 2¹⁴ = 1322304037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1322320393 and 1322320402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322320471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661160210 + 661160211.

It is an arithmetic number, because the mean of its divisors is an integer number (661160211).

Almost surely, 2^1322320421 is an apocalyptic number.

It is an amenable number.

1322320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322320421 is an equidigital number, since it uses as much as digits as its factorization.

1322320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1322320421 is about 36363.7239704627. The cubic root of 1322320421 is about 1097.6037150304.

Adding to 1322320421 its reverse (1240232231), we get a palindrome (2562552652).

The spelling of 1322320421 in words is "one billion, three hundred twenty-two million, three hundred twenty thousand, four hundred twenty-one".