133020221321 has 4 divisors (see below), whose sum is σ = 143252546052. Its totient is φ = 122787896592.

The previous prime is 133020221303. The next prime is 133020221353. The reversal of 133020221321 is 123122020331.

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 5660455696 + 127359765625 = 75236^2 + 356875^2 .

It is a cyclic number.

It is not a de Polignac number, because 133020221321 - 2²² = 133016027017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133020221293 and 133020221302.

It is not an unprimeable number, because it can be changed into a prime (133020224321) 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, 5116162346 + ... + 5116162371.

It is an arithmetic number, because the mean of its divisors is an integer number (35813136513).

Almost surely, 2^133020221321 is an apocalyptic number.

It is an amenable number.

133020221321 is a deficient number, since it is larger than the sum of its proper divisors (10232324731).

133020221321 is a wasteful number, since it uses less digits than its factorization.

133020221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232324730.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 133020221321 its reverse (123122020331), we get a palindrome (256142241652).

The spelling of 133020221321 in words is "one hundred thirty-three billion, twenty million, two hundred twenty-one thousand, three hundred twenty-one".