211212102122111 has 12 divisors (see below), whose sum is σ = 216359523058608. Its totient is φ = 206184485574144.

The previous prime is 211212102122041. The next prime is 211212102122123. The reversal of 211212102122111 is 111221201212112.

It is a happy number.

It is not a de Polignac number, because 211212102122111 - 2¹⁰ = 211212102121087 is a prime.

It is a super-2 number, since 2×211212102122111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212102122191) 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 11 ways as a sum of consecutive naturals, for example, 28736450 + ... + 35329983.

It is an arithmetic number, because the mean of its divisors is an integer number (18029960254884).

Almost surely, 2^{211212102122111} is an apocalyptic number.

211212102122111 is a deficient number, since it is larger than the sum of its proper divisors (5147420936497).

211212102122111 is an equidigital number, since it uses as much as digits as its factorization.

211212102122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64068302 (or 64068259 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211212102122111 its reverse (111221201212112), we get a palindrome (322433303334223).

Subtracting from 211212102122111 its reverse (111221201212112), we obtain a palindrome (99990900909999).

The spelling of 211212102122111 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, one hundred eleven".