21432112001 has 4 divisors (see below), whose sum is σ = 21888114432. Its totient is φ = 20976109572.

The previous prime is 21432111989. The next prime is 21432112019. The reversal of 21432112001 is 10021123412.

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 21432112001 - 2³⁴ = 4252242817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21432114001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228001145 + ... + 228001238.

It is an arithmetic number, because the mean of its divisors is an integer number (5472028608).

Almost surely, 2^21432112001 is an apocalyptic number.

It is an amenable number.

21432112001 is a deficient number, since it is larger than the sum of its proper divisors (456002431).

21432112001 is an equidigital number, since it uses as much as digits as its factorization.

21432112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456002430.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21432112001 its reverse (10021123412), we get a palindrome (31453235413).

The spelling of 21432112001 in words is "twenty-one billion, four hundred thirty-two million, one hundred twelve thousand, one".