2021122120 has 32 divisors (see below), whose sum is σ = 4653285120. Its totient is φ = 789647040.

The previous prime is 2021122111. The next prime is 2021122121. The reversal of 2021122120 is 212211202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021122120.

It is not an unprimeable number, because it can be changed into a prime (2021122121) 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, 585816 + ... + 589255.

It is an arithmetic number, because the mean of its divisors is an integer number (145415160).

Almost surely, 2^2021122120 is an apocalyptic number.

2021122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021122120 is an abundant number, since it is smaller than the sum of its proper divisors (2632163000).

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

2021122120 is a wasteful number, since it uses less digits than its factorization.

2021122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175125 (or 1175121 counting only the distinct ones).

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

The square root of 2021122120 is about 44956.8917964754. The cubic root of 2021122120 is about 1264.3408940743.

Adding to 2021122120 its reverse (212211202), we get a palindrome (2233333322).

The spelling of 2021122120 in words is "two billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty".