2021133530 has 24 divisors (see below), whose sum is σ = 3939419772. Its totient is φ = 746264064.

The previous prime is 2021133529. The next prime is 2021133563. The reversal of 2021133530 is 353311202.

It can be written as a sum of positive squares in 6 ways, for example, as 1681 + 2021131849 = 41^2 + 44957^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 596279 + ... + 599658.

Almost surely, 2^2021133530 is an apocalyptic number.

2021133530 is a deficient number, since it is larger than the sum of its proper divisors (1918286242).

2021133530 is a wasteful number, since it uses less digits than its factorization.

2021133530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195970 (or 1195957 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 2021133530 is about 44957.0186956386. The cubic root of 2021133530 is about 1264.3432732976.

Adding to 2021133530 its reverse (353311202), we get a palindrome (2374444732).

The spelling of 2021133530 in words is "two billion, twenty-one million, one hundred thirty-three thousand, five hundred thirty".