2021021330 has 16 divisors (see below), whose sum is σ = 3638421720. Its totient is φ = 808278912.

The previous prime is 2021021329. The next prime is 2021021351. The reversal of 2021021330 is 331201202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1221432601 + 799588729 = 34949^2 + 28277^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72302 + ... + 96278.

Almost surely, 2^2021021330 is an apocalyptic number.

2021021330 is a deficient number, since it is larger than the sum of its proper divisors (1617400390).

2021021330 is a wasteful number, since it uses less digits than its factorization.

2021021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32413.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2021021330 is about 44955.7708197735. The cubic root of 2021021330 is about 1264.3198768654.

Adding to 2021021330 its reverse (331201202), we get a palindrome (2352222532).

The spelling of 2021021330 in words is "two billion, twenty-one million, twenty-one thousand, three hundred thirty".