11991941242 has 32 divisors (see below), whose sum is σ = 18585096192. Its totient is φ = 5800119024.

The previous prime is 11991941209. The next prime is 11991941243. The reversal of 11991941242 is 24214919911.

It is not an unprimeable number, because it can be changed into a prime (11991941243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7192893 + ... + 7194559.

It is an arithmetic number, because the mean of its divisors is an integer number (580784256).

Almost surely, 2^11991941242 is an apocalyptic number.

11991941242 is a deficient number, since it is larger than the sum of its proper divisors (6593154950).

11991941242 is a wasteful number, since it uses less digits than its factorization.

11991941242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its digits is 46656, while the sum is 43.

It can be divided in two parts, 119919 and 41242, that added together give a palindrome (161161).

The spelling of 11991941242 in words is "eleven billion, nine hundred ninety-one million, nine hundred forty-one thousand, two hundred forty-two".