1322021320 has 64 divisors (see below), whose sum is σ = 3180870000. Its totient is φ = 492748800.

The previous prime is 1322021317. The next prime is 1322021329. The reversal of 1322021320 is 231202231.

It can be written as a sum of positive squares in 8 ways, for example, as 1237491684 + 84529636 = 35178^2 + 9194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1322021294 and 1322021303.

It is not an unprimeable number, because it can be changed into a prime (1322021329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59056 + ... + 78304.

Almost surely, 2^1322021320 is an apocalyptic number.

1322021320 is a gapful number since it is divisible by the number (10) 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 1322021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1590435000).

1322021320 is an abundant number, since it is smaller than the sum of its proper divisors (1858848680).

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

1322021320 is a wasteful number, since it uses less digits than its factorization.

1322021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19378 (or 19374 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1322021320 is about 36359.6111090314. The cubic root of 1322021320 is about 1097.5209516499.

Adding to 1322021320 its reverse (231202231), we get a palindrome (1553223551).

The spelling of 1322021320 in words is "one billion, three hundred twenty-two million, twenty-one thousand, three hundred twenty".