211111201212012 has 144 divisors (see below), whose sum is σ = 553004619847680. Its totient is φ = 67858911993600.

The previous prime is 211111201211951. The next prime is 211111201212013. The reversal of 211111201212012 is 210212102111112.

It is a happy number.

211111201212012 is a `hidden beast` number, since 211 + 11 + 120 + 121 + 201 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211111201212013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1931058312 + ... + 1931167632.

Almost surely, 2^{211111201212012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211111201212012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276502309923840).

211111201212012 is an abundant number, since it is smaller than the sum of its proper divisors (341893418635668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111201212012 is a wasteful number, since it uses less digits than its factorization.

211111201212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125244 (or 125239 counting only the distinct ones).

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

Adding to 211111201212012 its reverse (210212102111112), we get a palindrome (421323303323124).

The spelling of 211111201212012 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred one million, two hundred twelve thousand, twelve".