133223231321 has 4 divisors (see below), whose sum is σ = 137520754944. Its totient is φ = 128925707700.

The previous prime is 133223231303. The next prime is 133223231327. The reversal of 133223231321 is 123132322331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123132322331 = 71 ⋅1734258061.

It is a cyclic number.

It is not a de Polignac number, because 133223231321 - 2¹⁴ = 133223214937 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 (133223231327) 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, 2148761765 + ... + 2148761826.

It is an arithmetic number, because the mean of its divisors is an integer number (34380188736).

Almost surely, 2^133223231321 is an apocalyptic number.

It is an amenable number.

133223231321 is a deficient number, since it is larger than the sum of its proper divisors (4297523623).

133223231321 is an equidigital number, since it uses as much as digits as its factorization.

133223231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297523622.

The product of its digits is 3888, while the sum is 26.

Adding to 133223231321 its reverse (123132322331), we get a palindrome (256355553652).

The spelling of 133223231321 in words is "one hundred thirty-three billion, two hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty-one".