212222111121 has 48 divisors (see below), whose sum is σ = 318264515088. Its totient is φ = 136157760000.

The previous prime is 212222111113. The next prime is 212222111141. The reversal of 212222111121 is 121111222212.

212222111121 is a `hidden beast` number, since 212 + 222 + 111 + 121 = 666.

212222111121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 15285860496 + 196936250625 = 123636^2 + 443775^2 .

It is not a de Polignac number, because 212222111121 - 2³ = 212222111113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212222111094 and 212222111103.

It is not an unprimeable number, because it can be changed into a prime (212222111141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41601471 + ... + 41606571.

It is an arithmetic number, because the mean of its divisors is an integer number (6630510731).

Almost surely, 2^212222111121 is an apocalyptic number.

It is an amenable number.

212222111121 is a deficient number, since it is larger than the sum of its proper divisors (106042403967).

212222111121 is a wasteful number, since it uses less digits than its factorization.

212222111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482 (or 6479 counting only the distinct ones).

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

Adding to 212222111121 its reverse (121111222212), we get a palindrome (333333333333).

The spelling of 212222111121 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twenty-one".