1320021012 has 24 divisors (see below), whose sum is σ = 3083796576. Its totient is φ = 439471648.

The previous prime is 1320021007. The next prime is 1320021047. The reversal of 1320021012 is 2101200231.

1320021012 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56583 + ... + 76430.

It is an arithmetic number, because the mean of its divisors is an integer number (128491524).

Almost surely, 2^1320021012 is an apocalyptic number.

1320021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320021012 is an abundant number, since it is smaller than the sum of its proper divisors (1763775564).

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

1320021012 is a wasteful number, since it uses less digits than its factorization.

1320021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133847 (or 133845 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1320021012 is about 36332.0934161521. The cubic root of 1320021012 is about 1096.9671309988.

Adding to 1320021012 its reverse (2101200231), we get a palindrome (3421221243).

The spelling of 1320021012 in words is "one billion, three hundred twenty million, twenty-one thousand, twelve".