2021221012 has 12 divisors (see below), whose sum is σ = 3570194880. Its totient is φ = 1001165336.

The previous prime is 2021221009. The next prime is 2021221021. The reversal of 2021221012 is 2101221202.

It is a happy number.

It is a super-3 number, since 3×2021221012³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021220983 and 2021221001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360812 + ... + 2361667.

It is an arithmetic number, because the mean of its divisors is an integer number (297516240).

Almost surely, 2^2021221012 is an apocalyptic number.

It is an amenable number.

2021221012 is a deficient number, since it is larger than the sum of its proper divisors (1548973868).

2021221012 is a wasteful number, since it uses less digits than its factorization.

2021221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722590 (or 4722588 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021221012 is about 44957.9916366379. The cubic root of 2021221012 is about 1264.3615148241.

Adding to 2021221012 its reverse (2101221202), we get a palindrome (4122442214).

The spelling of 2021221012 in words is "two billion, twenty-one million, two hundred twenty-one thousand, twelve".