11211199966 has 4 divisors (see below), whose sum is σ = 16816799952. Its totient is φ = 5605599982.

The previous prime is 11211199963. The next prime is 11211199973. The reversal of 11211199966 is 66999111211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211199963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2802799990 + ... + 2802799993.

It is an arithmetic number, because the mean of its divisors is an integer number (4204199988).

Almost surely, 2^11211199966 is an apocalyptic number.

11211199966 is a deficient number, since it is larger than the sum of its proper divisors (5605599986).

11211199966 is an equidigital number, since it uses as much as digits as its factorization.

11211199966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605599985.

The product of its digits is 52488, while the sum is 46.

The spelling of 11211199966 in words is "eleven billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred sixty-six".