1321043441 has 2 divisors, whose sum is σ = 1321043442. Its totient is φ = 1321043440.

The previous prime is 1321043417. The next prime is 1321043501. The reversal of 1321043441 is 1443401231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214871025 + 106172416 = 34855^2 + 10304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321043441 - 2³⁰ = 247301617 is a prime.

It is a super-3 number, since 3×1321043441³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1321043401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660521720 + 660521721.

It is an arithmetic number, because the mean of its divisors is an integer number (660521721).

Almost surely, 2^1321043441 is an apocalyptic number.

It is an amenable number.

1321043441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321043441 is an equidigital number, since it uses as much as digits as its factorization.

1321043441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1321043441 is about 36346.1612966211. The cubic root of 1321043441 is about 1097.2502784003.

Adding to 1321043441 its reverse (1443401231), we get a palindrome (2764444672).

The spelling of 1321043441 in words is "one billion, three hundred twenty-one million, forty-three thousand, four hundred forty-one".