21234450001 has 8 divisors (see below), whose sum is σ = 21601651680. Its totient is φ = 20869900032.

The previous prime is 21234449993. The next prime is 21234450007. The reversal of 21234450001 is 10005443212.

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 21234450001 - 2³ = 21234449993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21234450007) 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, 646771 + ... + 678808.

It is an arithmetic number, because the mean of its divisors is an integer number (2700206460).

Almost surely, 2^21234450001 is an apocalyptic number.

It is an amenable number.

21234450001 is a deficient number, since it is larger than the sum of its proper divisors (367201679).

21234450001 is a wasteful number, since it uses less digits than its factorization.

21234450001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325855.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21234450001 its reverse (10005443212), we get a palindrome (31239893213).

The spelling of 21234450001 in words is "twenty-one billion, two hundred thirty-four million, four hundred fifty thousand, one".