212121112112 has 60 divisors (see below), whose sum is σ = 514859921856. Its totient is φ = 83916040320.

The previous prime is 212121112061. The next prime is 212121112123. The reversal of 212121112112 is 211211121212.

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 11 ways as a sum of consecutive naturals, for example, 10396064 + ... + 10416447.

Almost surely, 2^212121112112 is an apocalyptic number.

It is an amenable number.

212121112112 is an abundant number, since it is smaller than the sum of its proper divisors (302738809744).

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

212121112112 is a wasteful number, since it uses less digits than its factorization.

212121112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20812546 (or 20812533 counting only the distinct ones).

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

Adding to 212121112112 its reverse (211211121212), we get a palindrome (423332233324).

The spelling of 212121112112 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twelve".