133243144021 has 16 divisors (see below), whose sum is σ = 147402097920. Its totient is φ = 119659409280.

The previous prime is 133243144009. The next prime is 133243144031. The reversal of 133243144021 is 120441342331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133243144021 - 2¹⁷ = 133243012949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133243144031) 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 15 ways as a sum of consecutive naturals, for example, 156825 + ... + 539518.

It is an arithmetic number, because the mean of its divisors is an integer number (9212631120).

Almost surely, 2^133243144021 is an apocalyptic number.

It is an amenable number.

133243144021 is a deficient number, since it is larger than the sum of its proper divisors (14158953899).

133243144021 is a wasteful number, since it uses less digits than its factorization.

133243144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696756.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 133243144021 its reverse (120441342331), we get a palindrome (253684486352).

The spelling of 133243144021 in words is "one hundred thirty-three billion, two hundred forty-three million, one hundred forty-four thousand, twenty-one".