1321323002 has 4 divisors (see below), whose sum is σ = 1981984506. Its totient is φ = 660661500.

The previous prime is 1321323001. The next prime is 1321323041. The reversal of 1321323002 is 2003231231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2003231231 = 29 ⋅69076939.

It can be written as a sum of positive squares in only one way, i.e., 889888561 + 431434441 = 29831^2 + 20771^2 .

It is a super-2 number, since 2×1321323002² = 3491788951228584008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321323001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330330749 + ... + 330330752.

Almost surely, 2^1321323002 is an apocalyptic number.

1321323002 is a deficient number, since it is larger than the sum of its proper divisors (660661504).

1321323002 is an equidigital number, since it uses as much as digits as its factorization.

1321323002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660661503.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1321323002 is about 36350.0069050888. The cubic root of 1321323002 is about 1097.3276734705.

Adding to 1321323002 its reverse (2003231231), we get a palindrome (3324554233).

The spelling of 1321323002 in words is "one billion, three hundred twenty-one million, three hundred twenty-three thousand, two".