133443244021 has 8 divisors (see below), whose sum is σ = 135974727864. Its totient is φ = 130912267200.

The previous prime is 133443244009. The next prime is 133443244063. The reversal of 133443244021 is 120442344331.

It can be written as a sum of positive squares in 4 ways, for example, as 41579695921 + 91863548100 = 203911^2 + 303090^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133443244021 - 2²⁹ = 132906373109 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 (133443244001) 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 7 ways as a sum of consecutive naturals, for example, 427371 + ... + 670471.

It is an arithmetic number, because the mean of its divisors is an integer number (16996840983).

Almost surely, 2^133443244021 is an apocalyptic number.

It is an amenable number.

133443244021 is a deficient number, since it is larger than the sum of its proper divisors (2531483843).

133443244021 is a wasteful number, since it uses less digits than its factorization.

133443244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253511.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 133443244021 its reverse (120442344331), we get a palindrome (253885588352).

The spelling of 133443244021 in words is "one hundred thirty-three billion, four hundred forty-three million, two hundred forty-four thousand, twenty-one".