122212221222 has 192 divisors, whose sum is σ = 317300004864. Its totient is φ = 30690316800.

The previous prime is 122212221199. The next prime is 122212221223. The reversal of 122212221222 is 222122212221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

122212221222 is a modest number, since divided by 12221222 gives 1222 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212221223) 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, 12338472 + ... + 12348372.

It is an arithmetic number, because the mean of its divisors is an integer number (1652604192).

Almost surely, 2^122212221222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122212221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158650002432).

122212221222 is an abundant number, since it is smaller than the sum of its proper divisors (195087783642).

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

122212221222 is a wasteful number, since it uses less digits than its factorization.

122212221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023 (or 10010 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

Adding to 122212221222 its reverse (222122212221), we get a palindrome (344334433443).

Subtracting 122212221222 from its reverse (222122212221), we obtain a palindrome (99909990999).

The spelling of 122212221222 in words is "one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".