22220212221220 has 192 divisors, whose sum is σ = 51323603595264. Its totient is φ = 8031720752640.

The previous prime is 22220212221157. The next prime is 22220212221223. The reversal of 22220212221220 is 2212221202222.

It is a junction number, because it is equal to n+sod(n) for n = 22220212221191 and 22220212221200.

It is not an unprimeable number, because it can be changed into a prime (22220212221223) 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, 922639299 + ... + 922663381.

It is an arithmetic number, because the mean of its divisors is an integer number (267310435392).

Almost surely, 2^{22220212221220} is an apocalyptic number.

22220212221220 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 22220212221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25661801797632).

22220212221220 is an abundant number, since it is smaller than the sum of its proper divisors (29103391374044).

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

22220212221220 is a wasteful number, since it uses less digits than its factorization.

22220212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24602 (or 24600 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22220212221220 its reverse (2212221202222), we get a palindrome (24432433423442).

The spelling of 22220212221220 in words is "twenty-two trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".