2021140423021 has 2 divisors, whose sum is σ = 2021140423022. Its totient is φ = 2021140423020.

The previous prime is 2021140422997. The next prime is 2021140423031. The reversal of 2021140423021 is 1203240411202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1896803790025 + 124336632996 = 1377245^2 + 352614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021140423021 - 2³¹ = 2018992939373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021140422983 and 2021140423001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021140423031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010570211510 + 1010570211511.

It is an arithmetic number, because the mean of its divisors is an integer number (1010570211511).

Almost surely, 2^{2021140423021} is an apocalyptic number.

It is an amenable number.

2021140423021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021140423021 is an equidigital number, since it uses as much as digits as its factorization.

2021140423021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2021140423021 its reverse (1203240411202), we get a palindrome (3224380834223).

The spelling of 2021140423021 in words is "two trillion, twenty-one billion, one hundred forty million, four hundred twenty-three thousand, twenty-one".