1323001021 has 4 divisors (see below), whose sum is σ = 1323163072. Its totient is φ = 1322838972.

The previous prime is 1323000953. The next prime is 1323001033. The reversal of 1323001021 is 1201003231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1323001021 - 2¹⁵ = 1322968253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323000992 and 1323001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68091 + ... + 85336.

It is an arithmetic number, because the mean of its divisors is an integer number (330790768).

Almost surely, 2^1323001021 is an apocalyptic number.

It is an amenable number.

1323001021 is a deficient number, since it is larger than the sum of its proper divisors (162051).

1323001021 is an equidigital number, since it uses as much as digits as its factorization.

1323001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162050.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1323001021 is about 36373.0809940538. The cubic root of 1323001021 is about 1097.7919954068.

Adding to 1323001021 its reverse (1201003231), we get a palindrome (2524004252).

The spelling of 1323001021 in words is "one billion, three hundred twenty-three million, one thousand, twenty-one".