11842165884921 has 4 divisors (see below), whose sum is σ = 15789554513232. Its totient is φ = 7894777256612.

The previous prime is 11842165884911. The next prime is 11842165884949. The reversal of 11842165884921 is 12948856124811.

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.

It is a cyclic number.

It is not a de Polignac number, because 11842165884921 - 2⁷ = 11842165884793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11842165884911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1973694314151 + ... + 1973694314156.

It is an arithmetic number, because the mean of its divisors is an integer number (3947388628308).

Almost surely, 2^{11842165884921} is an apocalyptic number.

It is an amenable number.

11842165884921 is a deficient number, since it is larger than the sum of its proper divisors (3947388628311).

11842165884921 is an equidigital number, since it uses as much as digits as its factorization.

11842165884921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947388628310.

The product of its digits is 8847360, while the sum is 60.

The spelling of 11842165884921 in words is "eleven trillion, eight hundred forty-two billion, one hundred sixty-five million, eight hundred eighty-four thousand, nine hundred twenty-one".