411243541021 has 2 divisors, whose sum is σ = 411243541022. Its totient is φ = 411243541020.

The previous prime is 411243540991. The next prime is 411243541073. The reversal of 411243541021 is 120145342114.

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., 371598748921 + 39644792100 = 609589^2 + 199110^2 .

It is a cyclic number.

It is not a de Polignac number, because 411243541021 - 2⁷ = 411243540893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411243541721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205621770510 + 205621770511.

It is an arithmetic number, because the mean of its divisors is an integer number (205621770511).

Almost surely, 2^411243541021 is an apocalyptic number.

It is an amenable number.

411243541021 is a deficient number, since it is larger than the sum of its proper divisors (1).

411243541021 is an equidigital number, since it uses as much as digits as its factorization.

411243541021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 411243541021 its reverse (120145342114), we get a palindrome (531388883135).

The spelling of 411243541021 in words is "four hundred eleven billion, two hundred forty-three million, five hundred forty-one thousand, twenty-one".