2021042042441 has 2 divisors, whose sum is σ = 2021042042442. Its totient is φ = 2021042042440.

The previous prime is 2021042042413. The next prime is 2021042042471. The reversal of 2021042042441 is 1442402401202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1903561052416 + 117480990025 = 1379696^2 + 342755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021042042441 - 2³⁰ = 2019968300617 is a prime.

It is a super-2 number, since 2×2021042042441² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021042042441.

It is not a weakly prime, because it can be changed into another prime (2021042042471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010521021220 + 1010521021221.

It is an arithmetic number, because the mean of its divisors is an integer number (1010521021221).

Almost surely, 2^{2021042042441} is an apocalyptic number.

It is an amenable number.

2021042042441 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021042042441 is an equidigital number, since it uses as much as digits as its factorization.

2021042042441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 2021042042441 its reverse (1442402401202), we get a palindrome (3463444443643).

The spelling of 2021042042441 in words is "two trillion, twenty-one billion, forty-two million, forty-two thousand, four hundred forty-one".