11221446665 has 32 divisors (see below), whose sum is σ = 15876072576. Its totient is φ = 7506524160.

The previous prime is 11221446611. The next prime is 11221446697. The reversal of 11221446665 is 56664412211.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11221446665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174617 + ... + 230073.

It is an arithmetic number, because the mean of its divisors is an integer number (496127268).

Almost surely, 2^11221446665 is an apocalyptic number.

It is an amenable number.

11221446665 is a deficient number, since it is larger than the sum of its proper divisors (4654625911).

11221446665 is a wasteful number, since it uses less digits than its factorization.

11221446665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55769.

The product of its digits is 69120, while the sum is 38.

Adding to 11221446665 its reverse (56664412211), we get a palindrome (67885858876).

The spelling of 11221446665 in words is "eleven billion, two hundred twenty-one million, four hundred forty-six thousand, six hundred sixty-five".