2030221021 has 4 divisors (see below), whose sum is σ = 2068527132. Its totient is φ = 1991914912.

The previous prime is 2030221013. The next prime is 2030221051. The reversal of 2030221021 is 1201220302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1673955396 + 356265625 = 40914^2 + 18875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2030221021 - 2³ = 2030221013 is a prime.

It is a super-2 number, since 2×2030221021² = 8243594788220564882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2030220992 and 2030221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2030221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19152976 + ... + 19153081.

It is an arithmetic number, because the mean of its divisors is an integer number (517131783).

Almost surely, 2^2030221021 is an apocalyptic number.

It is an amenable number.

2030221021 is a deficient number, since it is larger than the sum of its proper divisors (38306111).

2030221021 is an equidigital number, since it uses as much as digits as its factorization.

2030221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38306110.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2030221021 is about 45057.9740001700. The cubic root of 2030221021 is about 1266.2353684496.

Adding to 2030221021 its reverse (1201220302), we get a palindrome (3231441323).

The spelling of 2030221021 in words is "two billion, thirty million, two hundred twenty-one thousand, twenty-one".