1323412021 has 2 divisors, whose sum is σ = 1323412022. Its totient is φ = 1323412020.

The previous prime is 1323411953. The next prime is 1323412033. The reversal of 1323412021 is 1202143231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981568900 + 341843121 = 31330^2 + 18489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323412021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323412021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323412061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661706010 + 661706011.

It is an arithmetic number, because the mean of its divisors is an integer number (661706011).

Almost surely, 2^1323412021 is an apocalyptic number.

It is an amenable number.

1323412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323412021 is an equidigital number, since it uses as much as digits as its factorization.

1323412021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1323412021 is about 36378.7303379324. The cubic root of 1323412021 is about 1097.9056626902.

Adding to 1323412021 its reverse (1202143231), we get a palindrome (2525555252).

The spelling of 1323412021 in words is "one billion, three hundred twenty-three million, four hundred twelve thousand, twenty-one".