22021212231200 has 576 divisors, whose sum is σ = 68519548968192. Its totient is φ = 6725685657600.

The previous prime is 22021212231181. The next prime is 22021212231229. The reversal of 22021212231200 is 213221212022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 235315619 + ... + 235409181.

It is an arithmetic number, because the mean of its divisors is an integer number (118957550292).

Almost surely, 2^{22021212231200} is an apocalyptic number.

22021212231200 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 22021212231200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34259774484096).

22021212231200 is an abundant number, since it is smaller than the sum of its proper divisors (46498336736992).

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

22021212231200 is a wasteful number, since it uses less digits than its factorization.

22021212231200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93717 (or 93704 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22021212231200 its reverse (213221212022), we get a palindrome (22234433443222).

The spelling of 22021212231200 in words is "twenty-two trillion, twenty-one billion, two hundred twelve million, two hundred thirty-one thousand, two hundred".