21323133232231 has 4 divisors (see below), whose sum is σ = 21593046311200. Its totient is φ = 21053220153264.

The previous prime is 21323133232103. The next prime is 21323133232273. The reversal of 21323133232231 is 13223233132312.

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 21323133232231 - 2⁷ = 21323133232103 is a prime.

It is a super-2 number, since 2×21323133232231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323133232193 and 21323133232202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323133232631) 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, 134956539366 + ... + 134956539523.

It is an arithmetic number, because the mean of its divisors is an integer number (5398261577800).

Almost surely, 2^{21323133232231} is an apocalyptic number.

21323133232231 is a deficient number, since it is larger than the sum of its proper divisors (269913078969).

21323133232231 is an equidigital number, since it uses as much as digits as its factorization.

21323133232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269913078968.

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

Adding to 21323133232231 its reverse (13223233132312), we get a palindrome (34546366364543).

The spelling of 21323133232231 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirty-three million, two hundred thirty-two thousand, two hundred thirty-one".