2021221232 has 40 divisors (see below), whose sum is σ = 4093964160. Its totient is φ = 964877760.

The previous prime is 2021221231. The next prime is 2021221243. The reversal of 2021221232 is 2321221202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021221232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221231) 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, 205319 + ... + 214937.

It is an arithmetic number, because the mean of its divisors is an integer number (102349104).

Almost surely, 2^2021221232 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 2021221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046982080).

2021221232 is an abundant number, since it is smaller than the sum of its proper divisors (2072742928).

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

2021221232 is a wasteful number, since it uses less digits than its factorization.

2021221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2021221232 is about 44957.9940833663. The cubic root of 2021221232 is about 1264.3615606972.

Adding to 2021221232 its reverse (2321221202), we get a palindrome (4342442434).

The spelling of 2021221232 in words is "two billion, twenty-one million, two hundred twenty-one thousand, two hundred thirty-two".