11043320421 has 16 divisors (see below), whose sum is σ = 16831692800. Its totient is φ = 6309052848.

The previous prime is 11043320413. The next prime is 11043320423. The reversal of 11043320421 is 12402334011.

11043320421 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 11043320421 - 2³ = 11043320413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11043320423) 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 15 ways as a sum of consecutive naturals, for example, 40740 + ... + 154098.

It is an arithmetic number, because the mean of its divisors is an integer number (1051980800).

Almost surely, 2^11043320421 is an apocalyptic number.

It is an amenable number.

11043320421 is a deficient number, since it is larger than the sum of its proper divisors (5788372379).

11043320421 is a wasteful number, since it uses less digits than its factorization.

11043320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118008.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 11043320421 its reverse (12402334011), we get a palindrome (23445654432).

The spelling of 11043320421 in words is "eleven billion, forty-three million, three hundred twenty thousand, four hundred twenty-one".