11443413421 has 16 divisors (see below), whose sum is σ = 12582155520. Its totient is φ = 10321375680.

The previous prime is 11443413413. The next prime is 11443413463. The reversal of 11443413421 is 12431434411.

It is not a de Polignac number, because 11443413421 - 2³ = 11443413413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11443413421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11443413481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788095 + ... + 802483.

It is an arithmetic number, because the mean of its divisors is an integer number (786384720).

Almost surely, 2^11443413421 is an apocalyptic number.

11443413421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11443413421 is a deficient number, since it is larger than the sum of its proper divisors (1138742099).

11443413421 is a wasteful number, since it uses less digits than its factorization.

11443413421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14964.

The product of its digits is 4608, while the sum is 28.

Adding to 11443413421 its reverse (12431434411), we get a palindrome (23874847832).

The spelling of 11443413421 in words is "eleven billion, four hundred forty-three million, four hundred thirteen thousand, four hundred twenty-one".