21231123323233 has 8 divisors (see below), whose sum is σ = 22480212310920. Its totient is φ = 19982056488960.

The previous prime is 21231123323219. The next prime is 21231123323239. The reversal of 21231123323233 is 33232332113212.

It can be written as a sum of positive squares in 4 ways, for example, as 3071491089489 + 18159632233744 = 1752567^2 + 4261412^2 .

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 21231123323233 - 2²⁹ = 21230586452321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231123323195 and 21231123323204.

It is not an unprimeable number, because it can be changed into a prime (21231123323239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3544728 + ... + 7418041.

It is an arithmetic number, because the mean of its divisors is an integer number (2810026538865).

Almost surely, 2^{21231123323233} is an apocalyptic number.

It is an amenable number.

21231123323233 is a deficient number, since it is larger than the sum of its proper divisors (1249088987687).

21231123323233 is a wasteful number, since it uses less digits than its factorization.

21231123323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076707.

The product of its digits is 23328, while the sum is 31.

Adding to 21231123323233 its reverse (33232332113212), we get a palindrome (54463455436445).

The spelling of 21231123323233 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred thirty-three".