11611211611 has 4 divisors (see below), whose sum is σ = 11881239832. Its totient is φ = 11341183392.

The previous prime is 11611211587. The next prime is 11611211621.

11611211611 is nontrivially palindromic in base 10.

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 11611211611 - 2⁷ = 11611211483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11611211621) 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, 135014046 + ... + 135014131.

It is an arithmetic number, because the mean of its divisors is an integer number (2970309958).

Almost surely, 2^11611211611 is an apocalyptic number.

11611211611 is a deficient number, since it is larger than the sum of its proper divisors (270028221).

11611211611 is an equidigital number, since it uses as much as digits as its factorization.

11611211611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270028220.

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

The spelling of 11611211611 in words is "eleven billion, six hundred eleven million, two hundred eleven thousand, six hundred eleven".