2021120988 has 24 divisors (see below), whose sum is σ = 4734306192. Its totient is φ = 671084544.

The previous prime is 2021120963. The next prime is 2021120989. The reversal of 2021120988 is 8890211202.

It is a super-2 number, since 2×2021120988² = 8169860096268192288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021120989) 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, 324595 + ... + 330762.

It is an arithmetic number, because the mean of its divisors is an integer number (197262758).

Almost surely, 2^2021120988 is an apocalyptic number.

It is an amenable number.

2021120988 is an abundant number, since it is smaller than the sum of its proper divisors (2713185204).

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

2021120988 is a wasteful number, since it uses less digits than its factorization.

2021120988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655621 (or 655619 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 2021120988 is about 44956.8792066353. The cubic root of 2021120988 is about 1264.3406580282.

The spelling of 2021120988 in words is "two billion, twenty-one million, one hundred twenty thousand, nine hundred eighty-eight".