21432241121 has 8 divisors (see below), whose sum is σ = 21736900800. Its totient is φ = 21127659280.

The previous prime is 21432241109. The next prime is 21432241141. The reversal of 21432241121 is 12114223412.

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 21432241121 - 2²² = 21428046817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432241141) 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, 748415 + ... + 776523.

It is an arithmetic number, because the mean of its divisors is an integer number (2717112600).

Almost surely, 2^21432241121 is an apocalyptic number.

It is an amenable number.

21432241121 is a deficient number, since it is larger than the sum of its proper divisors (304659679).

21432241121 is a wasteful number, since it uses less digits than its factorization.

21432241121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38919.

The product of its digits is 768, while the sum is 23.

Adding to 21432241121 its reverse (12114223412), we get a palindrome (33546464533).

The spelling of 21432241121 in words is "twenty-one billion, four hundred thirty-two million, two hundred forty-one thousand, one hundred twenty-one".