1200322020 has 24 divisors (see below), whose sum is σ = 3360901824. Its totient is φ = 320085856.

The previous prime is 1200322003. The next prime is 1200322033. The reversal of 1200322020 is 202230021.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200321987 and 1200322005.

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 7 ways as a sum of consecutive naturals, for example, 10002624 + ... + 10002743.

It is an arithmetic number, because the mean of its divisors is an integer number (140037576).

Almost surely, 2^1200322020 is an apocalyptic number.

1200322020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200322020 is an abundant number, since it is smaller than the sum of its proper divisors (2160579804).

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

1200322020 is a wasteful number, since it uses less digits than its factorization.

1200322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20005379 (or 20005377 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1200322020 is about 34645.6637979416. The cubic root of 1200322020 is about 1062.7536154902.

Adding to 1200322020 its reverse (202230021), we get a palindrome (1402552041).

The spelling of 1200322020 in words is "one billion, two hundred million, three hundred twenty-two thousand, twenty".