133220321321 has 6 divisors (see below), whose sum is σ = 140600948922. Its totient is φ = 126208725120.

The previous prime is 133220321317. The next prime is 133220321323. The reversal of 133220321321 is 123123022331.

It can be written as a sum of positive squares in only one way, i.e., 75315118096 + 57905203225 = 274436^2 + 240635^2 .

It is not a de Polignac number, because 133220321321 - 2² = 133220321317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133220321323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184515320 + ... + 184516041.

It is an arithmetic number, because the mean of its divisors is an integer number (23433491487).

Almost surely, 2^133220321321 is an apocalyptic number.

It is an amenable number.

133220321321 is a deficient number, since it is larger than the sum of its proper divisors (7380627601).

133220321321 is an equidigital number, since it uses as much as digits as its factorization.

133220321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369031399 (or 369031380 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 133220321321 its reverse (123123022331), we get a palindrome (256343343652).

The spelling of 133220321321 in words is "one hundred thirty-three billion, two hundred twenty million, three hundred twenty-one thousand, three hundred twenty-one".