1222320000 has 320 divisors, whose sum is σ = 4435580160. Its totient is φ = 295680000.

The previous prime is 1222319977. The next prime is 1222320007. The reversal of 1222320000 is 232221.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222320007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2639769 + ... + 2640231.

It is an arithmetic number, because the mean of its divisors is an integer number (13861188).

Almost surely, 2^1222320000 is an apocalyptic number.

1222320000 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 1222320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2217790080).

1222320000 is an abundant number, since it is smaller than the sum of its proper divisors (3213260160).

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

1222320000 is an equidigital number, since it uses as much as digits as its factorization.

1222320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 484 counting only the distinct ones).

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

The square root of 1222320000 is about 34961.6933228355. The cubic root of 1222320000 is about 1069.2066206546.

Adding to 1222320000 its reverse (232221), we get a palindrome (1222552221).

It can be divided in two parts, 12223 and 20000, that added together give a palindrome (32223).

The spelling of 1222320000 in words is "one billion, two hundred twenty-two million, three hundred twenty thousand".