1116211121161 has 4 divisors (see below), whose sum is σ = 1116240048000. Its totient is φ = 1116182194324.

The previous prime is 1116211121029. The next prime is 1116211121167. The reversal of 1116211121161 is 1611211126111.

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 1116211121161 - 2¹¹ = 1116211119113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116211121167) 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, 14405461 + ... + 14482738.

It is an arithmetic number, because the mean of its divisors is an integer number (279060012000).

Almost surely, 2^{1116211121161} is an apocalyptic number.

It is an amenable number.

1116211121161 is a deficient number, since it is larger than the sum of its proper divisors (28926839).

1116211121161 is an equidigital number, since it uses as much as digits as its factorization.

1116211121161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28926838.

The product of its digits is 144, while the sum is 25.

Adding to 1116211121161 its reverse (1611211126111), we get a palindrome (2727422247272).

The spelling of 1116211121161 in words is "one trillion, one hundred sixteen billion, two hundred eleven million, one hundred twenty-one thousand, one hundred sixty-one".