1322220000 has 120 divisors (see below), whose sum is σ = 4337342856. Its totient is φ = 352576000.

The previous prime is 1322219923. The next prime is 1322220041. The reversal of 1322220000 is 222231.

It is a tau number, because it is divible by the number of its divisors (120).

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 19 ways as a sum of consecutive naturals, for example, 48982 + ... + 71018.

Almost surely, 2^1322220000 is an apocalyptic number.

1322220000 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 1322220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168671428).

1322220000 is an abundant number, since it is smaller than the sum of its proper divisors (3015122856).

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

1322220000 is an equidigital number, since it uses as much as digits as its factorization.

1322220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22070 (or 22047 counting only the distinct ones).

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

The square root of 1322220000 is about 36362.3431588230. The cubic root of 1322220000 is about 1097.5759292151.

Adding to 1322220000 its reverse (222231), we get a palindrome (1322442231).

The spelling of 1322220000 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand".