21233210003123 has 4 divisors (see below), whose sum is σ = 21233291098488. Its totient is φ = 21233128907760.

The previous prime is 21233210003041. The next prime is 21233210003171. The reversal of 21233210003123 is 32130001233212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233210003123 - 2⁴⁰ = 20133698375347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233210003183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40153661 + ... + 40679022.

It is an arithmetic number, because the mean of its divisors is an integer number (5308322774622).

Almost surely, 2^{21233210003123} is an apocalyptic number.

21233210003123 is a deficient number, since it is larger than the sum of its proper divisors (81095365).

21233210003123 is an equidigital number, since it uses as much as digits as its factorization.

21233210003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81095364.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21233210003123 its reverse (32130001233212), we get a palindrome (53363211236335).

The spelling of 21233210003123 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred ten million, three thousand, one hundred twenty-three".