212201211222 has 192 divisors, whose sum is σ = 637227601920. Its totient is φ = 49236076800.

The previous prime is 212201211221. The next prime is 212201211223. The reversal of 212201211222 is 222112102212.

It is a happy number.

212201211222 is a `hidden beast` number, since 212 + 20 + 1 + 211 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (212201211221) and next prime (212201211223).

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 = 212201211195 and 212201211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 368604 + ... + 748512.

It is an arithmetic number, because the mean of its divisors is an integer number (3318893760).

Almost surely, 2^212201211222 is an apocalyptic number.

212201211222 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 212201211222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318613800960).

212201211222 is an abundant number, since it is smaller than the sum of its proper divisors (425026390698).

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

212201211222 is a wasteful number, since it uses less digits than its factorization.

212201211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379979 (or 379976 counting only the distinct ones).

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

Adding to 212201211222 its reverse (222112102212), we get a palindrome (434313313434).

The spelling of 212201211222 in words is "two hundred twelve billion, two hundred one million, two hundred eleven thousand, two hundred twenty-two".