2021042291 has 2 divisors, whose sum is σ = 2021042292. Its totient is φ = 2021042290.

The previous prime is 2021042279. The next prime is 2021042339. The reversal of 2021042291 is 1922401202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021042291 - 2³⁰ = 947300467 is a prime.

It is a super-2 number, since 2×2021042291² = 8169223884021057362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021042251) 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 as a sum of consecutive naturals, namely, 1010521145 + 1010521146.

It is an arithmetic number, because the mean of its divisors is an integer number (1010521146).

Almost surely, 2^2021042291 is an apocalyptic number.

2021042291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021042291 is an equidigital number, since it uses as much as digits as its factorization.

2021042291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2021042291 is about 44956.0039483048. The cubic root of 2021042291 is about 1264.3242478101.

Adding to 2021042291 its reverse (1922401202), we get a palindrome (3943443493).

The spelling of 2021042291 in words is "two billion, twenty-one million, forty-two thousand, two hundred ninety-one".