211022121222 has 48 divisors (see below), whose sum is σ = 499072214160. Its totient is φ = 63908577600.

The previous prime is 211022121217. The next prime is 211022121229. The reversal of 211022121222 is 222121220112.

It is a happy number.

211022121222 is a `hidden beast` number, since 211 + 0 + 221 + 212 + 22 = 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 = 211022121195 and 211022121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211022121229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26572 + ... + 650192.

It is an arithmetic number, because the mean of its divisors is an integer number (10397337795).

Almost surely, 2^211022121222 is an apocalyptic number.

211022121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211022121222 is an abundant number, since it is smaller than the sum of its proper divisors (288050092938).

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

211022121222 is a wasteful number, since it uses less digits than its factorization.

211022121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625349 (or 625346 counting only the distinct ones).

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

Adding to 211022121222 its reverse (222121220112), we get a palindrome (433143341334).

The spelling of 211022121222 in words is "two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".