21234333143 has 8 divisors (see below), whose sum is σ = 21745042176. Its totient is φ = 20724391800.

The previous prime is 21234333103. The next prime is 21234333161. The reversal of 21234333143 is 34133343212.

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

It is not a de Polignac number, because 21234333143 - 2⁸ = 21234332887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234333103) 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, 135743 + ... + 246768.

It is an arithmetic number, because the mean of its divisors is an integer number (2718130272).

Almost surely, 2^21234333143 is an apocalyptic number.

21234333143 is a deficient number, since it is larger than the sum of its proper divisors (510709033).

21234333143 is a wasteful number, since it uses less digits than its factorization.

21234333143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383845.

The product of its digits is 15552, while the sum is 29.

Adding to 21234333143 its reverse (34133343212), we get a palindrome (55367676355).

The spelling of 21234333143 in words is "twenty-one billion, two hundred thirty-four million, three hundred thirty-three thousand, one hundred forty-three".