2021281000 has 64 divisors (see below), whose sum is σ = 4810104000. Its totient is φ = 794785600.

The previous prime is 2021280997. The next prime is 2021281021. The reversal of 2021281000 is 1821202.

It is a super-2 number, since 2×2021281000² = 8171153761922000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41871 + ... + 76129.

It is an arithmetic number, because the mean of its divisors is an integer number (75157875).

Almost surely, 2^2021281000 is an apocalyptic number.

2021281000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021281000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405052000).

2021281000 is an abundant number, since it is smaller than the sum of its proper divisors (2788823000).

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

2021281000 is a wasteful number, since it uses less digits than its factorization.

2021281000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34339 (or 34325 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2021281000 is about 44958.6587878242. The cubic root of 2021281000 is about 1264.3740230666.

The spelling of 2021281000 in words is "two billion, twenty-one million, two hundred eighty-one thousand".