133452991721 has 16 divisors (see below), whose sum is σ = 156109329024. Its totient is φ = 111696084864.

The previous prime is 133452991687. The next prime is 133452991723. The reversal of 133452991721 is 127199254331.

It is a de Polignac number, because none of the positive numbers 2^k-133452991721 is a prime.

It is a super-3 number, since 3×133452991721³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133452991723) 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, 1019795 + ... + 1143191.

It is an arithmetic number, because the mean of its divisors is an integer number (9756833064).

Almost surely, 2^133452991721 is an apocalyptic number.

It is an amenable number.

133452991721 is a deficient number, since it is larger than the sum of its proper divisors (22656337303).

133452991721 is a wasteful number, since it uses less digits than its factorization.

133452991721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127040.

The product of its digits is 408240, while the sum is 47.

The spelling of 133452991721 in words is "one hundred thirty-three billion, four hundred fifty-two million, nine hundred ninety-one thousand, seven hundred twenty-one".