11721734042 has 8 divisors (see below), whose sum is σ = 17599625076. Its totient is φ = 5855192352.

The previous prime is 11721733999. The next prime is 11721734047. The reversal of 11721734042 is 24043712711.

11721734042 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10930493401 + 791240641 = 104549^2 + 28129^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11721734047) 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, 2834753 + ... + 2838884.

Almost surely, 2^11721734042 is an apocalyptic number.

11721734042 is a deficient number, since it is larger than the sum of its proper divisors (5877891034).

11721734042 is a wasteful number, since it uses less digits than its factorization.

11721734042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674672.

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 11721734042 in words is "eleven billion, seven hundred twenty-one million, seven hundred thirty-four thousand, forty-two".