133123323221 has 16 divisors (see below), whose sum is σ = 154654089600. Its totient is φ = 112221305280.

The previous prime is 133123323199. The next prime is 133123323259. The reversal of 133123323221 is 122323321331.

It is not a de Polignac number, because 133123323221 - 2³⁴ = 115943454037 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 (133123323521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4972730 + ... + 4999428.

It is an arithmetic number, because the mean of its divisors is an integer number (9665880600).

Almost surely, 2^133123323221 is an apocalyptic number.

It is an amenable number.

133123323221 is a deficient number, since it is larger than the sum of its proper divisors (21530766379).

133123323221 is a wasteful number, since it uses less digits than its factorization.

133123323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38444.

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

Adding to 133123323221 its reverse (122323321331), we get a palindrome (255446644552).

The spelling of 133123323221 in words is "one hundred thirty-three billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred twenty-one".