133221440321 has 4 divisors (see below), whose sum is σ = 141057995652. Its totient is φ = 125384884992.

The previous prime is 133221440311. The next prime is 133221440323. The reversal of 133221440321 is 123044122331.

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 108913200400 + 24308239921 = 330020^2 + 155911^2 .

It is a cyclic number.

It is not a de Polignac number, because 133221440321 - 2²² = 133217246017 is a prime.

It is a super-2 number, since 2×133221440321² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133221440323) 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 3 ways as a sum of consecutive naturals, for example, 3918277640 + ... + 3918277673.

It is an arithmetic number, because the mean of its divisors is an integer number (35264498913).

Almost surely, 2^133221440321 is an apocalyptic number.

It is an amenable number.

133221440321 is a deficient number, since it is larger than the sum of its proper divisors (7836555331).

133221440321 is an equidigital number, since it uses as much as digits as its factorization.

133221440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7836555330.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 133221440321 its reverse (123044122331), we get a palindrome (256265562652).

The spelling of 133221440321 in words is "one hundred thirty-three billion, two hundred twenty-one million, four hundred forty thousand, three hundred twenty-one".