212112012222 has 192 divisors, whose sum is σ = 528722588160. Its totient is φ = 60860217600.

The previous prime is 212112012197. The next prime is 212112012227. The reversal of 212112012222 is 222210211212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 212112012195 and 212112012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112012227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 155165383 + ... + 155166749.

It is an arithmetic number, because the mean of its divisors is an integer number (2753763480).

Almost surely, 2^212112012222 is an apocalyptic number.

212112012222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112012222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264361294080).

212112012222 is an abundant number, since it is smaller than the sum of its proper divisors (316610575938).

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

212112012222 is a wasteful number, since it uses less digits than its factorization.

212112012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1916 counting only the distinct ones).

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

Adding to 212112012222 its reverse (222210211212), we get a palindrome (434322223434).

The spelling of 212112012222 in words is "two hundred twelve billion, one hundred twelve million, twelve thousand, two hundred twenty-two".