11403232021 has 8 divisors (see below), whose sum is σ = 11716064640. Its totient is φ = 11094384768.

The previous prime is 11403232019. The next prime is 11403232039. The reversal of 11403232021 is 12023230411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11403232021 - 2¹ = 11403232019 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 11403232021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403232081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990541 + ... + 1001986.

It is an arithmetic number, because the mean of its divisors is an integer number (1464508080).

Almost surely, 2^11403232021 is an apocalyptic number.

It is an amenable number.

11403232021 is a deficient number, since it is larger than the sum of its proper divisors (312832619).

11403232021 is an equidigital number, since it uses as much as digits as its factorization.

11403232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992683.

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

Adding to 11403232021 its reverse (12023230411), we get a palindrome (23426462432).

The spelling of 11403232021 in words is "eleven billion, four hundred three million, two hundred thirty-two thousand, twenty-one".