1323220012 has 12 divisors (see below), whose sum is σ = 2324647080. Its totient is φ = 659035136.

The previous prime is 1323220009. The next prime is 1323220039. The reversal of 1323220012 is 2100223231.

It is a super-2 number, since 2×1323220012² = 3501822400314560288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642562 + ... + 644617.

It is an arithmetic number, because the mean of its divisors is an integer number (193720590).

Almost surely, 2^1323220012 is an apocalyptic number.

It is an amenable number.

1323220012 is a deficient number, since it is larger than the sum of its proper divisors (1001427068).

1323220012 is a wasteful number, since it uses less digits than its factorization.

1323220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287440 (or 1287438 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1323220012 is about 36376.0912138729. The cubic root of 1323220012 is about 1097.8525630858.

Adding to 1323220012 its reverse (2100223231), we get a palindrome (3423443243).

The spelling of 1323220012 in words is "one billion, three hundred twenty-three million, two hundred twenty thousand, twelve".