1323211320 has 96 divisors (see below), whose sum is σ = 4553424720. Its totient is φ = 332098560.

The previous prime is 1323211301. The next prime is 1323211381. The reversal of 1323211320 is 231123231.

1323211320 is a `hidden beast` number, since 1 + 323 + 21 + 1 + 320 = 666.

It is a super-2 number, since 2×1323211320² = 3501776394752284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1323211293 and 1323211302.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 101986 + ... + 114225.

Almost surely, 2^1323211320 is an apocalyptic number.

1323211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323211320 is an abundant number, since it is smaller than the sum of its proper divisors (3230213400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323211320 is a wasteful number, since it uses less digits than its factorization.

1323211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216245 (or 216238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1323211320 is about 36375.9717395976. The cubic root of 1323211320 is about 1097.8501592136.

Adding to 1323211320 its reverse (231123231), we get a palindrome (1554334551).

The spelling of 1323211320 in words is "one billion, three hundred twenty-three million, two hundred eleven thousand, three hundred twenty".