133288813721 has 4 divisors (see below), whose sum is σ = 152330072832. Its totient is φ = 114247554612.

The previous prime is 133288813717. The next prime is 133288813733. The reversal of 133288813721 is 127318882331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127318882331 = 1039 ⋅122539829.

It is a cyclic number.

It is not a de Polignac number, because 133288813721 - 2² = 133288813717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133288813751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9520629545 + ... + 9520629558.

It is an arithmetic number, because the mean of its divisors is an integer number (38082518208).

Almost surely, 2^133288813721 is an apocalyptic number.

It is an amenable number.

133288813721 is a deficient number, since it is larger than the sum of its proper divisors (19041259111).

133288813721 is an equidigital number, since it uses as much as digits as its factorization.

133288813721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19041259110.

The product of its digits is 387072, while the sum is 47.

The spelling of 133288813721 in words is "one hundred thirty-three billion, two hundred eighty-eight million, eight hundred thirteen thousand, seven hundred twenty-one".