212122112001111 has 192 divisors, whose sum is σ = 369236387520000. Its totient is φ = 115927365058560.

The previous prime is 212122112001097. The next prime is 212122112001119. The reversal of 212122112001111 is 111100211221212.

It is a happy number.

212122112001111 is a `hidden beast` number, since 21 + 212 + 211 + 200 + 11 + 11 = 666.

It is not a de Polignac number, because 212122112001111 - 2¹⁰ = 212122112000087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122112001119) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10149858540 + ... + 10149879438.

It is an arithmetic number, because the mean of its divisors is an integer number (1923106185000).

Almost surely, 2^{212122112001111} is an apocalyptic number.

212122112001111 is a deficient number, since it is larger than the sum of its proper divisors (157114275518889).

212122112001111 is a wasteful number, since it uses less digits than its factorization.

212122112001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014 (or 22011 counting only the distinct ones).

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

Adding to 212122112001111 its reverse (111100211221212), we get a palindrome (323222323222323).

The spelling of 212122112001111 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred twelve million, one thousand, one hundred eleven".