2121020988 has 48 divisors (see below), whose sum is σ = 5002661664. Its totient is φ = 699390720.

The previous prime is 2121020983. The next prime is 2121020989. The reversal of 2121020988 is 8890201212.

It is a super-2 number, since 2×2121020988² = 8997460063072992288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425406 + ... + 430362.

It is an arithmetic number, because the mean of its divisors is an integer number (104222118).

Almost surely, 2^2121020988 is an apocalyptic number.

It is an amenable number.

2121020988 is an abundant number, since it is smaller than the sum of its proper divisors (2881640676).

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

2121020988 is a wasteful number, since it uses less digits than its factorization.

2121020988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342 (or 5340 counting only the distinct ones).

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

The square root of 2121020988 is about 46054.5436194954. The cubic root of 2121020988 is about 1284.8378500096.

The spelling of 2121020988 in words is "two billion, one hundred twenty-one million, twenty thousand, nine hundred eighty-eight".