133323131221 has 12 divisors (see below), whose sum is σ = 155349122400. Its totient is φ = 114086164920.

The previous prime is 133323131213. The next prime is 133323131243. The reversal of 133323131221 is 122131323331.

It is not a de Polignac number, because 133323131221 - 2³ = 133323131213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133323135221) 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 11 ways as a sum of consecutive naturals, for example, 2241835 + ... + 2300536.

It is an arithmetic number, because the mean of its divisors is an integer number (12945760200).

Almost surely, 2^133323131221 is an apocalyptic number.

It is an amenable number.

133323131221 is a deficient number, since it is larger than the sum of its proper divisors (22025991179).

133323131221 is an equidigital number, since it uses as much as digits as its factorization.

133323131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542984 (or 4542977 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 133323131221 its reverse (122131323331), we get a palindrome (255454454552).

The spelling of 133323131221 in words is "one hundred thirty-three billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".