1041043221521 has 2 divisors, whose sum is σ = 1041043221522. Its totient is φ = 1041043221520.

The previous prime is 1041043221409. The next prime is 1041043221523. The reversal of 1041043221521 is 1251223401401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847253975296 + 193789246225 = 920464^2 + 440215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1041043221521 - 2¹⁸ = 1041042959377 is a prime.

Together with 1041043221523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1041043221523) 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, 520521610760 + 520521610761.

It is an arithmetic number, because the mean of its divisors is an integer number (520521610761).

Almost surely, 2^{1041043221521} is an apocalyptic number.

It is an amenable number.

1041043221521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1041043221521 is an equidigital number, since it uses as much as digits as its factorization.

1041043221521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1041043221521 its reverse (1251223401401), we get a palindrome (2292266622922).

The spelling of 1041043221521 in words is "one trillion, forty-one billion, forty-three million, two hundred twenty-one thousand, five hundred twenty-one".