21232123255 has 8 divisors (see below), whose sum is σ = 29118340512. Its totient is φ = 14559170208.

The previous prime is 21232123229. The next prime is 21232123273. The reversal of 21232123255 is 55232123212.

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 21232123255 - 2⁵ = 21232123223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303316012 + ... + 303316081.

It is an arithmetic number, because the mean of its divisors is an integer number (3639792564).

Almost surely, 2^21232123255 is an apocalyptic number.

21232123255 is a deficient number, since it is larger than the sum of its proper divisors (7886217257).

21232123255 is an equidigital number, since it uses as much as digits as its factorization.

21232123255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606632105.

The product of its digits is 7200, while the sum is 28.

Adding to 21232123255 its reverse (55232123212), we get a palindrome (76464246467).

The spelling of 21232123255 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred fifty-five".