2021112212 has 108 divisors (see below), whose sum is σ = 4366162836. Its totient is φ = 816076800.

The previous prime is 2021112211. The next prime is 2021112217. The reversal of 2021112212 is 2122111202.

It can be written as a sum of positive squares in 2 ways, for example, as 1323940996 + 697171216 = 36386^2 + 26404^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021112211) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10471988 + ... + 10472180.

Almost surely, 2^2021112212 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 2021112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2183081418).

2021112212 is an abundant number, since it is smaller than the sum of its proper divisors (2345050624).

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

2021112212 is a wasteful number, since it uses less digits than its factorization.

2021112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2021112212 is about 44956.7816018896. The cubic root of 2021112212 is about 1264.3388280421.

Adding to 2021112212 its reverse (2122111202), we get a palindrome (4143223414).

It can be divided in two parts, 20211 and 12212, that added together give a palindrome (32423).

The spelling of 2021112212 in words is "two billion, twenty-one million, one hundred twelve thousand, two hundred twelve".