2021233021 has 2 divisors, whose sum is σ = 2021233022. Its totient is φ = 2021233020.

The previous prime is 2021233009. The next prime is 2021233043. The reversal of 2021233021 is 1203321202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1621672900 + 399560121 = 40270^2 + 19989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021233021 - 2⁵ = 2021232989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021232986 and 2021233004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021233001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010616510 + 1010616511.

It is an arithmetic number, because the mean of its divisors is an integer number (1010616511).

Almost surely, 2^2021233021 is an apocalyptic number.

It is an amenable number.

2021233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021233021 is an equidigital number, since it uses as much as digits as its factorization.

2021233021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2021233021 is about 44958.1251944518. The cubic root of 2021233021 is about 1264.3640188694.

Adding to 2021233021 its reverse (1203321202), we get a palindrome (3224554223).

The spelling of 2021233021 in words is "two billion, twenty-one million, two hundred thirty-three thousand, twenty-one".