212111010012222 has 128 divisors (see below), whose sum is σ = 486195548774400. Its totient is φ = 68508183456000.

The previous prime is 212111010012193. The next prime is 212111010012229. The reversal of 212111010012222 is 222210010111212.

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 = 212111010012195 and 212111010012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111010012229) 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, 3629460522 + ... + 3629518962.

It is an arithmetic number, because the mean of its divisors is an integer number (3798402724800).

Almost surely, 2^{212111010012222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212111010012222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243097774387200).

212111010012222 is an abundant number, since it is smaller than the sum of its proper divisors (274084538762178).

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

212111010012222 is a wasteful number, since it uses less digits than its factorization.

212111010012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72759 (or 72753 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212111010012222 its reverse (222210010111212), we get a palindrome (434321020123434).

The spelling of 212111010012222 in words is "two hundred twelve trillion, one hundred eleven billion, ten million, twelve thousand, two hundred twenty-two".