11612221611 has 4 divisors (see below), whose sum is σ = 15482962152. Its totient is φ = 7741481072.

The previous prime is 11612221609. The next prime is 11612221619.

11612221611 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 11612221611 - 2¹ = 11612221609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11612221619) 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, 1935370266 + ... + 1935370271.

It is an arithmetic number, because the mean of its divisors is an integer number (3870740538).

Almost surely, 2^11612221611 is an apocalyptic number.

11612221611 is a deficient number, since it is larger than the sum of its proper divisors (3870740541).

11612221611 is an equidigital number, since it uses as much as digits as its factorization.

11612221611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870740540.

The product of its digits is 288, while the sum is 24.

The spelling of 11612221611 in words is "eleven billion, six hundred twelve million, two hundred twenty-one thousand, six hundred eleven".