212112101220111 has 32 divisors (see below), whose sum is σ = 314589712248000. Its totient is φ = 141250831994880.

The previous prime is 212112101220067. The next prime is 212112101220113. The reversal of 212112101220111 is 111022101211212.

It is a happy number.

212112101220111 is a `hidden beast` number, since 2 + 121 + 1 + 210 + 1 + 220 + 111 = 666.

It is not a de Polignac number, because 212112101220111 - 2¹³ = 212112101211919 is a prime.

It is a super-2 number, since 2×212112101220111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112101220113) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 112394881 + ... + 114266501.

It is an arithmetic number, because the mean of its divisors is an integer number (9830928507750).

Almost surely, 2^{212112101220111} is an apocalyptic number.

212112101220111 is a deficient number, since it is larger than the sum of its proper divisors (102477611027889).

212112101220111 is a wasteful number, since it uses less digits than its factorization.

212112101220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876296 (or 1876290 counting only the distinct ones).

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

Adding to 212112101220111 its reverse (111022101211212), we get a palindrome (323134202431323).

The spelling of 212112101220111 in words is "two hundred twelve trillion, one hundred twelve billion, one hundred one million, two hundred twenty thousand, one hundred eleven".