2021110212212 has 144 divisors (see below), whose sum is σ = 4488462720000. Its totient is φ = 789203390976.

The previous prime is 2021110212211. The next prime is 2021110212217. The reversal of 2021110212212 is 2122120111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021110212211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135828989 + ... + 135843867.

It is an arithmetic number, because the mean of its divisors is an integer number (31169880000).

Almost surely, 2^{2021110212212} 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 2021110212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2244231360000).

2021110212212 is an abundant number, since it is smaller than the sum of its proper divisors (2467352507788).

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

2021110212212 is a wasteful number, since it uses less digits than its factorization.

2021110212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15598 (or 15589 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021110212212 its reverse (2122120111202), we get a palindrome (4143230323414).

It can be divided in two parts, 2021110 and 212212, that added together give a palindrome (2233322).

The spelling of 2021110212212 in words is "two trillion, twenty-one billion, one hundred ten million, two hundred twelve thousand, two hundred twelve".