1211040443 has 2 divisors, whose sum is σ = 1211040444. Its totient is φ = 1211040442.

The previous prime is 1211040409. The next prime is 1211040463. The reversal of 1211040443 is 3440401121.

It is an a-pointer prime, because the next prime (1211040463) can be obtained adding 1211040443 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211040443 - 2¹⁶ = 1210974907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211040463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605520221 + 605520222.

It is an arithmetic number, because the mean of its divisors is an integer number (605520222).

Almost surely, 2^1211040443 is an apocalyptic number.

1211040443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211040443 is an equidigital number, since it uses as much as digits as its factorization.

1211040443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1211040443 is about 34800.0063649419. The cubic root of 1211040443 is about 1065.9075758192.

Adding to 1211040443 its reverse (3440401121), we get a palindrome (4651441564).

The spelling of 1211040443 in words is "one billion, two hundred eleven million, forty thousand, four hundred forty-three".