211121212221212 has 12 divisors (see below), whose sum is σ = 375724191241560. Its totient is φ = 103771443295056.

The previous prime is 211121212221203. The next prime is 211121212221263. The reversal of 211121212221212 is 212122212121112.

211121212221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447290703623 + ... + 447290704094.

It is an arithmetic number, because the mean of its divisors is an integer number (31310349270130).

Almost surely, 2^{211121212221212} is an apocalyptic number.

It is an amenable number.

211121212221212 is a deficient number, since it is larger than the sum of its proper divisors (164602979020348).

211121212221212 is a wasteful number, since it uses less digits than its factorization.

211121212221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894581407780 (or 894581407778 counting only the distinct ones).

The product of its digits is 256, while the sum is 23.

Adding to 211121212221212 its reverse (212122212121112), we get a palindrome (423243424342324).

The spelling of 211121212221212 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".