2221321021320 has 256 divisors, whose sum is σ = 7005035520000. Its totient is φ = 562430094336.

The previous prime is 2221321021307. The next prime is 2221321021321. The reversal of 2221321021320 is 231201231222.

It is not an unprimeable number, because it can be changed into a prime (2221321021321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 218650401 + ... + 218660559.

It is an arithmetic number, because the mean of its divisors is an integer number (27363420000).

Almost surely, 2^{2221321021320} is an apocalyptic number.

2221321021320 is a gapful number since it is divisible by the number (20) 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 2221321021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3502517760000).

2221321021320 is an abundant number, since it is smaller than the sum of its proper divisors (4783714498680).

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

2221321021320 is a wasteful number, since it uses less digits than its factorization.

2221321021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10772 (or 10768 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2221321021320 its reverse (231201231222), we get a palindrome (2452522252542).

The spelling of 2221321021320 in words is "two trillion, two hundred twenty-one billion, three hundred twenty-one million, twenty-one thousand, three hundred twenty".