23133311321 has 4 divisors (see below), whose sum is σ = 23142020532. Its totient is φ = 23124602112.

The previous prime is 23133311309. The next prime is 23133311351. The reversal of 23133311321 is 12311333132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7235884096 + 15897427225 = 85064^2 + 126085^2 .

It is a cyclic number.

It is not a de Polignac number, because 23133311321 - 2²² = 23129117017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23133311351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4350620 + ... + 4355933.

It is an arithmetic number, because the mean of its divisors is an integer number (5785505133).

Almost surely, 2^23133311321 is an apocalyptic number.

It is an amenable number.

23133311321 is a deficient number, since it is larger than the sum of its proper divisors (8709211).

23133311321 is an equidigital number, since it uses as much as digits as its factorization.

23133311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709210.

The product of its digits is 972, while the sum is 23.

Adding to 23133311321 its reverse (12311333132), we get a palindrome (35444644453).

The spelling of 23133311321 in words is "twenty-three billion, one hundred thirty-three million, three hundred eleven thousand, three hundred twenty-one".