212121221120112 has 40 divisors (see below), whose sum is σ = 548022757842304. Its totient is φ = 70701533498304.

The previous prime is 212121221120111. The next prime is 212121221120117. The reversal of 212121221120112 is 211021122121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121221120111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172512508 + ... + 173737755.

Almost surely, 2^{212121221120112} is an apocalyptic number.

It is an amenable number.

212121221120112 is an abundant number, since it is smaller than the sum of its proper divisors (335901536722192).

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

212121221120112 is a wasteful number, since it uses less digits than its factorization.

212121221120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346263037 (or 346263031 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212121221120112 its reverse (211021122121212), we get a palindrome (423142343241324).

The spelling of 212121221120112 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twelve".