11611116211 has 4 divisors (see below), whose sum is σ = 11612426392. Its totient is φ = 11609806032.

The previous prime is 11611116173. The next prime is 11611116221. The reversal of 11611116211 is 11261111611.

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

It is a cyclic number.

It is not a de Polignac number, because 11611116211 - 2¹⁵ = 11611083443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11611116221) 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, 641706 + ... + 659551.

It is an arithmetic number, because the mean of its divisors is an integer number (2903106598).

Almost surely, 2^11611116211 is an apocalyptic number.

11611116211 is a deficient number, since it is larger than the sum of its proper divisors (1310181).

11611116211 is an equidigital number, since it uses as much as digits as its factorization.

11611116211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310180.

The product of its digits is 72, while the sum is 22.

Adding to 11611116211 its reverse (11261111611), we get a palindrome (22872227822).

The spelling of 11611116211 in words is "eleven billion, six hundred eleven million, one hundred sixteen thousand, two hundred eleven".