22120212221220 has 96 divisors (see below), whose sum is σ = 63158653635840. Its totient is φ = 5782525166080.

The previous prime is 22120212221153. The next prime is 22120212221243. The reversal of 22120212221220 is 2212221202122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810601 + ... + 6700559.

It is an arithmetic number, because the mean of its divisors is an integer number (657902642040).

Almost surely, 2^{22120212221220} is an apocalyptic number.

22120212221220 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 22120212221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31579326817920).

22120212221220 is an abundant number, since it is smaller than the sum of its proper divisors (41038441414620).

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

22120212221220 is a wasteful number, since it uses less digits than its factorization.

22120212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891205 (or 5891203 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22120212221220 its reverse (2212221202122), we get a palindrome (24332433423342).

The spelling of 22120212221220 in words is "twenty-two trillion, one hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".