11611211116 has 24 divisors (see below), whose sum is σ = 20405080080. Its totient is φ = 5781216000.

The previous prime is 11611211113. The next prime is 11611211137. The reversal of 11611211116 is 61111211611.

It is not an unprimeable number, because it can be changed into a prime (11611211113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2761816 + ... + 2766016.

It is an arithmetic number, because the mean of its divisors is an integer number (850211670).

Almost surely, 2^11611211116 is an apocalyptic number.

It is an amenable number.

11611211116 is a deficient number, since it is larger than the sum of its proper divisors (8793868964).

11611211116 is a wasteful number, since it uses less digits than its factorization.

11611211116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945 (or 6943 counting only the distinct ones).

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

Multiplying 11611211116 by its sum of digits (22), we get a palindrome (255446644552).

Adding to 11611211116 its reverse (61111211611), we get a palindrome (72722422727).

The spelling of 11611211116 in words is "eleven billion, six hundred eleven million, two hundred eleven thousand, one hundred sixteen".