1321160000 has 70 divisors (see below), whose sum is σ = 3276146610. Its totient is φ = 528448000.

The previous prime is 1321159969. The next prime is 1321160017. The reversal of 1321160000 is 611231.

It can be written as a sum of positive squares in 5 ways, for example, as 1002608896 + 318551104 = 31664^2 + 17848^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23486 + ... + 56514.

Almost surely, 2^1321160000 is an apocalyptic number.

1321160000 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 1321160000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638073305).

1321160000 is an abundant number, since it is smaller than the sum of its proper divisors (1954986610).

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

1321160000 is an frugal number, since it uses more digits than its factorization.

1321160000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33061 (or 33036 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1321160000 is about 36347.7647180676. The cubic root of 1321160000 is about 1097.2825485059.

Adding to 1321160000 its reverse (611231), we get a palindrome (1321771231).

The spelling of 1321160000 in words is "one billion, three hundred twenty-one million, one hundred sixty thousand".