212111102122 has 8 divisors (see below), whose sum is σ = 321316818372. Its totient is φ = 105005496000.

The previous prime is 212111102117. The next prime is 212111102129. The reversal of 212111102122 is 221201111212.

It can be written as a sum of positive squares in 2 ways, for example, as 195283564281 + 16827537841 = 441909^2 + 129721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×212111102122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111102096 and 212111102105.

It is not an unprimeable number, because it can be changed into a prime (212111102129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525027279 + ... + 525027682.

Almost surely, 2^212111102122 is an apocalyptic number.

212111102122 is a deficient number, since it is larger than the sum of its proper divisors (109205716250).

212111102122 is a wasteful number, since it uses less digits than its factorization.

212111102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050055064.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212111102122 its reverse (221201111212), we get a palindrome (433312213334).

The spelling of 212111102122 in words is "two hundred twelve billion, one hundred eleven million, one hundred two thousand, one hundred twenty-two".