220222111212 has 72 divisors (see below), whose sum is σ = 589818417552. Its totient is φ = 69042355200.

The previous prime is 220222111181. The next prime is 220222111217. The reversal of 220222111212 is 212111222022.

It is a happy number.

220222111212 is a `hidden beast` number, since 220 + 2 + 221 + 11 + 212 = 666.

It is a super-2 number, since 2×220222111212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (220222111217) 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, 784887 + ... + 1027857.

It is an arithmetic number, because the mean of its divisors is an integer number (8191922466).

Almost surely, 2^220222111212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220222111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294909208776).

220222111212 is an abundant number, since it is smaller than the sum of its proper divisors (369596306340).

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

220222111212 is a wasteful number, since it uses less digits than its factorization.

220222111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244479 (or 244474 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220222111212 its reverse (212111222022), we get a palindrome (432333333234).

The spelling of 220222111212 in words is "two hundred twenty billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twelve".