1323222012 has 72 divisors (see below), whose sum is σ = 3826289376. Its totient is φ = 377702784.

The previous prime is 1323221989. The next prime is 1323222023. The reversal of 1323222012 is 2102223231.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374478 + ... + 377994.

It is an arithmetic number, because the mean of its divisors is an integer number (53142908).

Almost surely, 2^1323222012 is an apocalyptic number.

1323222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1323222012 is an abundant number, since it is smaller than the sum of its proper divisors (2503067364).

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

1323222012 is a wasteful number, since it uses less digits than its factorization.

1323222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1323222012 is about 36376.1187044467. The cubic root of 1323222012 is about 1097.8531162072.

Adding to 1323222012 its reverse (2102223231), we get a palindrome (3425445243).

The spelling of 1323222012 in words is "one billion, three hundred twenty-three million, two hundred twenty-two thousand, twelve".