133122123323221 has 4 divisors (see below), whose sum is σ = 133122146419692. Its totient is φ = 133122100226752.

The previous prime is 133122123323219. The next prime is 133122123323353. The reversal of 133122123323221 is 122323321221331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 43012099006321 + 90110024316900 = 6558361^2 + 9492630^2 .

It is a cyclic number.

It is not a de Polignac number, because 133122123323221 - 2¹ = 133122123323219 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 (133122123323201) 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, 5039871 + ... + 17077603.

It is an arithmetic number, because the mean of its divisors is an integer number (33280536604923).

Almost surely, 2^{133122123323221} is an apocalyptic number.

It is an amenable number.

133122123323221 is a deficient number, since it is larger than the sum of its proper divisors (23096471).

133122123323221 is a wasteful number, since it uses less digits than its factorization.

133122123323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23096470.

The product of its digits is 15552, while the sum is 31.

Adding to 133122123323221 its reverse (122323321221331), we get a palindrome (255445444544552).

The spelling of 133122123323221 in words is "one hundred thirty-three trillion, one hundred twenty-two billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred twenty-one".