1320221112 has 96 divisors (see below), whose sum is σ = 3848115600. Its totient is φ = 376352256.

The previous prime is 1320221083. The next prime is 1320221129. The reversal of 1320221112 is 2111220231.

It is a junction number, because it is equal to n+sod(n) for n = 1320221091 and 1320221100.

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, 668158 + ... + 670130.

Almost surely, 2^1320221112 is an apocalyptic number.

1320221112 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 1320221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1924057800).

1320221112 is an abundant number, since it is smaller than the sum of its proper divisors (2527894488).

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

1320221112 is a wasteful number, since it uses less digits than its factorization.

1320221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1320221112 is about 36334.8470755004. The cubic root of 1320221112 is about 1097.0225573975.

Adding to 1320221112 its reverse (2111220231), we get a palindrome (3431441343).

The spelling of 1320221112 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, one hundred twelve".