212120021112 has 32 divisors (see below), whose sum is σ = 530832008400. Its totient is φ = 70635746304.

The previous prime is 212120021093. The next prime is 212120021159. The reversal of 212120021112 is 211120021212.

It is a junction number, because it is equal to n+sod(n) for n = 212120021091 and 212120021100.

It is a congruent number.

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, 4408537 + ... + 4456392.

Almost surely, 2^212120021112 is an apocalyptic number.

It is an amenable number.

212120021112 is an abundant number, since it is smaller than the sum of its proper divisors (318711987288).

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

212120021112 is a wasteful number, since it uses less digits than its factorization.

212120021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865935 (or 8865931 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212120021112 its reverse (211120021212), we get a palindrome (423240042324).

The spelling of 212120021112 in words is "two hundred twelve billion, one hundred twenty million, twenty-one thousand, one hundred twelve".