212111011101222 has 48 divisors (see below), whose sum is σ = 462980675888640. Its totient is φ = 70181446902000.

The previous prime is 212111011101181. The next prime is 212111011101247. The reversal of 212111011101222 is 222101110111212.

It is a happy number.

212111011101222 is a `hidden beast` number, since 21 + 211 + 101 + 110 + 1 + 222 = 666.

It is a super-2 number, since 2×212111011101222² (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 = 212111011101195 and 212111011101204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77930904 + ... + 80606747.

It is an arithmetic number, because the mean of its divisors is an integer number (9645430747680).

Almost surely, 2^{212111011101222} is an apocalyptic number.

212111011101222 is an abundant number, since it is smaller than the sum of its proper divisors (250869664787418).

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

212111011101222 is a wasteful number, since it uses less digits than its factorization.

212111011101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158538209 (or 158538206 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212111011101222 its reverse (222101110111212), we get a palindrome (434212121212434).

The spelling of 212111011101222 in words is "two hundred twelve trillion, one hundred eleven billion, eleven million, one hundred one thousand, two hundred twenty-two".