43111321441 has 2 divisors, whose sum is σ = 43111321442. Its totient is φ = 43111321440.

The previous prime is 43111321433. The next prime is 43111321471. The reversal of 43111321441 is 14412311134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38935577041 + 4175744400 = 197321^2 + 64620^2 .

It is a cyclic number.

It is not a de Polignac number, because 43111321441 - 2³ = 43111321433 is a prime.

It is not a weakly prime, because it can be changed into another prime (43111321471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21555660720 + 21555660721.

It is an arithmetic number, because the mean of its divisors is an integer number (21555660721).

Almost surely, 2^43111321441 is an apocalyptic number.

It is an amenable number.

43111321441 is a deficient number, since it is larger than the sum of its proper divisors (1).

43111321441 is an equidigital number, since it uses as much as digits as its factorization.

43111321441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

Adding to 43111321441 its reverse (14412311134), we get a palindrome (57523632575).

The spelling of 43111321441 in words is "forty-three billion, one hundred eleven million, three hundred twenty-one thousand, four hundred forty-one".