21132041432401 has 4 divisors (see below), whose sum is σ = 21132784526400. Its totient is φ = 21131298338404.

The previous prime is 21132041432237. The next prime is 21132041432407. The reversal of 21132041432401 is 10423414023112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21132041432401 - 2¹⁵ = 21132041399633 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 21132041432401.

It is not an unprimeable number, because it can be changed into a prime (21132041432407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371504341 + ... + 371561218.

It is an arithmetic number, because the mean of its divisors is an integer number (5283196131600).

Almost surely, 2^{21132041432401} is an apocalyptic number.

It is an amenable number.

21132041432401 is a deficient number, since it is larger than the sum of its proper divisors (743093999).

21132041432401 is an equidigital number, since it uses as much as digits as its factorization.

21132041432401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743093998.

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

Adding to 21132041432401 its reverse (10423414023112), we get a palindrome (31555455455513).

The spelling of 21132041432401 in words is "twenty-one trillion, one hundred thirty-two billion, forty-one million, four hundred thirty-two thousand, four hundred one".