21322223042320 has 120 divisors (see below), whose sum is σ = 50402764266624. Its totient is φ = 8386809809664.

The previous prime is 21322223042287. The next prime is 21322223042327. The reversal of 21322223042320 is 2324032222312.

It is not an unprimeable number, because it can be changed into a prime (21322223042327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1923167817 + ... + 1923178903.

Almost surely, 2^{21322223042320} is an apocalyptic number.

21322223042320 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 21322223042320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25201382133312).

21322223042320 is an abundant number, since it is smaller than the sum of its proper divisors (29080541224304).

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

21322223042320 is an equidigital number, since it uses as much as digits as its factorization.

21322223042320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365 (or 11760 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21322223042320 its reverse (2324032222312), we get a palindrome (23646255264632).

The spelling of 21322223042320 in words is "twenty-one trillion, three hundred twenty-two billion, two hundred twenty-three million, forty-two thousand, three hundred twenty".