211201210101222 has 128 divisors (see below), whose sum is σ = 529843461235200. Its totient is φ = 61771844534400.

The previous prime is 211201210101209. The next prime is 211201210101293. The reversal of 211201210101222 is 222101012102112.

211201210101222 is a `hidden beast` number, since 21 + 1 + 201 + 210 + 10 + 1 + 222 = 666.

It is a super-2 number, since 2×211201210101222² (a number of 29 digits) contains 22 as substring.

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 = 211201210101195 and 211201210101204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47140873 + ... + 51426299.

It is an arithmetic number, because the mean of its divisors is an integer number (4139402040900).

Almost surely, 2^{211201210101222} is an apocalyptic number.

211201210101222 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 211201210101222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264921730617600).

211201210101222 is an abundant number, since it is smaller than the sum of its proper divisors (318642251133978).

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

211201210101222 is a wasteful number, since it uses less digits than its factorization.

211201210101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288339 (or 4288333 counting only the distinct ones).

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

Adding to 211201210101222 its reverse (222101012102112), we get a palindrome (433302222203334).

The spelling of 211201210101222 in words is "two hundred eleven trillion, two hundred one billion, two hundred ten million, one hundred one thousand, two hundred twenty-two".