222012211212 has 144 divisors (see below), whose sum is σ = 649852598304. Its totient is φ = 63160320000.

The previous prime is 222012211189. The next prime is 222012211271. The reversal of 222012211212 is 212112210222.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2658412 + ... + 2740652.

It is an arithmetic number, because the mean of its divisors is an integer number (4512865266).

Almost surely, 2^222012211212 is an apocalyptic number.

222012211212 is a gapful number since it is divisible by the number (22) 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 222012211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324926299152).

222012211212 is an abundant number, since it is smaller than the sum of its proper divisors (427840387092).

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

222012211212 is a wasteful number, since it uses less digits than its factorization.

222012211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82680 (or 82675 counting only the distinct ones).

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

Adding to 222012211212 its reverse (212112210222), we get a palindrome (434124421434).

The spelling of 222012211212 in words is "two hundred twenty-two billion, twelve million, two hundred eleven thousand, two hundred twelve".