211231200222 has 128 divisors (see below), whose sum is σ = 542402380800. Its totient is φ = 59684688000.

The previous prime is 211231200203. The next prime is 211231200233. The reversal of 211231200222 is 222002132112.

211231200222 is a `hidden beast` number, since 2 + 11 + 231 + 200 + 222 = 666.

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 = 211231200195 and 211231200204.

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, 38977029 + ... + 38982447.

It is an arithmetic number, because the mean of its divisors is an integer number (4237518600).

Almost surely, 2^211231200222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211231200222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271201190400).

211231200222 is an abundant number, since it is smaller than the sum of its proper divisors (331171180578).

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

211231200222 is a wasteful number, since it uses less digits than its factorization.

211231200222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559 (or 6553 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211231200222 its reverse (222002132112), we get a palindrome (433233332334).

The spelling of 211231200222 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred thousand, two hundred twenty-two".