12211666507 has 4 divisors (see below), whose sum is σ = 12330226480. Its totient is φ = 12093106536.

The previous prime is 12211666469. The next prime is 12211666543. The reversal of 12211666507 is 70566611221.

It is a happy number.

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 12211666507 - 2²³ = 12203277899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211663507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59279832 + ... + 59280037.

It is an arithmetic number, because the mean of its divisors is an integer number (3082556620).

Almost surely, 2^12211666507 is an apocalyptic number.

12211666507 is a deficient number, since it is larger than the sum of its proper divisors (118559973).

12211666507 is a wasteful number, since it uses less digits than its factorization.

12211666507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118559972.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 12211666507 in words is "twelve billion, two hundred eleven million, six hundred sixty-six thousand, five hundred seven".