11430443421 has 6 divisors (see below), whose sum is σ = 16510640510. Its totient is φ = 7620295608.

The previous prime is 11430443417. The next prime is 11430443429. The reversal of 11430443421 is 12434403411.

11430443421 is a `hidden beast` number, since 1 + 14 + 304 + 4 + 342 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9660137796 + 1770305625 = 98286^2 + 42075^2 .

It is not a de Polignac number, because 11430443421 - 2² = 11430443417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11430443429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 635024626 + ... + 635024643.

Almost surely, 2^11430443421 is an apocalyptic number.

It is an amenable number.

11430443421 is a deficient number, since it is larger than the sum of its proper divisors (5080197089).

11430443421 is a wasteful number, since it uses less digits than its factorization.

11430443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270049275 (or 1270049272 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 11430443421 its reverse (12434403411), we get a palindrome (23864846832).

The spelling of 11430443421 in words is "eleven billion, four hundred thirty million, four hundred forty-three thousand, four hundred twenty-one".