211112211212 has 24 divisors (see below), whose sum is σ = 424583228160. Its totient is φ = 89971203600.

The previous prime is 211112211179. The next prime is 211112211223. The reversal of 211112211212 is 212112211112.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21055664 + ... + 21065687.

It is an arithmetic number, because the mean of its divisors is an integer number (17690967840).

Almost surely, 2^211112211212 is an apocalyptic number.

It is an amenable number.

211112211212 is an abundant number, since it is smaller than the sum of its proper divisors (213471016948).

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

211112211212 is a wasteful number, since it uses less digits than its factorization.

211112211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42121541 (or 42121539 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 211112211212 its reverse (212112211112), we get a palindrome (423224422324).

The spelling of 211112211212 in words is "two hundred eleven billion, one hundred twelve million, two hundred eleven thousand, two hundred twelve".