2156111201163 has 4 divisors (see below), whose sum is σ = 2874814934888. Its totient is φ = 1437407467440.

The previous prime is 2156111201149. The next prime is 2156111201191. The reversal of 2156111201163 is 3611021116512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2156111201163 - 2⁴ = 2156111201147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156111201163.

It is not an unprimeable number, because it can be changed into a prime (2156111201143) 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 3 ways as a sum of consecutive naturals, for example, 359351866858 + ... + 359351866863.

It is an arithmetic number, because the mean of its divisors is an integer number (718703733722).

Almost surely, 2^{2156111201163} is an apocalyptic number.

2156111201163 is a deficient number, since it is larger than the sum of its proper divisors (718703733725).

2156111201163 is an equidigital number, since it uses as much as digits as its factorization.

2156111201163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718703733724.

The product of its (nonzero) digits is 2160, while the sum is 30.

Adding to 2156111201163 its reverse (3611021116512), we get a palindrome (5767132317675).

The spelling of 2156111201163 in words is "two trillion, one hundred fifty-six billion, one hundred eleven million, two hundred one thousand, one hundred sixty-three".