11441432421 has 12 divisors (see below), whose sum is σ = 16537000480. Its totient is φ = 7622781480.

The previous prime is 11441432417. The next prime is 11441432447. The reversal of 11441432421 is 12423414411.

11441432421 is a `hidden beast` number, since 1 + 1 + 4 + 414 + 3 + 242 + 1 = 666.

It is not a de Polignac number, because 11441432421 - 2² = 11441432417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11441432221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388345 + ... + 416766.

Almost surely, 2^11441432421 is an apocalyptic number.

It is an amenable number.

11441432421 is a deficient number, since it is larger than the sum of its proper divisors (5095568059).

11441432421 is a wasteful number, since it uses less digits than its factorization.

11441432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806696 (or 806693 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 11441432421 its reverse (12423414411), we get a palindrome (23864846832).

The spelling of 11441432421 in words is "eleven billion, four hundred forty-one million, four hundred thirty-two thousand, four hundred twenty-one".