11321220043 has 12 divisors (see below), whose sum is σ = 13173746520. Its totient is φ = 9700834752.

The previous prime is 11321219999. The next prime is 11321220049. The reversal of 11321220043 is 34002212311.

It is a happy number.

11321220043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11321220043 - 2¹³ = 11321211851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11321220043.

It is not an unprimeable number, because it can be changed into a prime (11321220049) 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 in 11 ways as a sum of consecutive naturals, for example, 127468 + ... + 197206.

It is an arithmetic number, because the mean of its divisors is an integer number (1097812210).

Almost surely, 2^11321220043 is an apocalyptic number.

11321220043 is a deficient number, since it is larger than the sum of its proper divisors (1852526477).

11321220043 is an equidigital number, since it uses as much as digits as its factorization.

11321220043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73066 (or 73059 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 11321220043 its reverse (34002212311), we get a palindrome (45323432354).

The spelling of 11321220043 in words is "eleven billion, three hundred twenty-one million, two hundred twenty thousand, forty-three".