212120022121112 has 96 divisors (see below), whose sum is σ = 464022653875200. Its totient is φ = 90640861786944.

The previous prime is 212120022121109. The next prime is 212120022121127. The reversal of 212120022121112 is 211121220021212.

It is a super-2 number, since 2×212120022121112² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 904341593 + ... + 904576119.

It is an arithmetic number, because the mean of its divisors is an integer number (4833569311200).

Almost surely, 2^{212120022121112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212120022121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232011326937600).

212120022121112 is an abundant number, since it is smaller than the sum of its proper divisors (251902631754088).

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

212120022121112 is a wasteful number, since it uses less digits than its factorization.

212120022121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241333 (or 241322 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212120022121112 its reverse (211121220021212), we get a palindrome (423241242142324).

The spelling of 212120022121112 in words is "two hundred twelve trillion, one hundred twenty billion, twenty-two million, one hundred twenty-one thousand, one hundred twelve".