1323221112 has 192 divisors, whose sum is σ = 4012968960. Its totient is φ = 391910400.

The previous prime is 1323221111. The next prime is 1323221131. The reversal of 1323221112 is 2111223231.

It is a super-2 number, since 2×1323221112² = 3501828222485033088, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323221111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1631187 + ... + 1631997.

It is an arithmetic number, because the mean of its divisors is an integer number (20900880).

Almost surely, 2^1323221112 is an apocalyptic number.

1323221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006484480).

1323221112 is an abundant number, since it is smaller than the sum of its proper divisors (2689747848).

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

1323221112 is a wasteful number, since it uses less digits than its factorization.

1323221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 907 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1323221112 is about 36376.1063336911. The cubic root of 1323221112 is about 1097.8528673026.

Adding to 1323221112 its reverse (2111223231), we get a palindrome (3434444343).

The spelling of 1323221112 in words is "one billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred twelve".