11444812221 has 32 divisors (see below), whose sum is σ = 16126967808. Its totient is φ = 7208766720.

The previous prime is 11444812187. The next prime is 11444812229. The reversal of 11444812221 is 12221844411.

It is not a de Polignac number, because 11444812221 - 2¹⁰ = 11444811197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11444812229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1889620 + ... + 1895666.

It is an arithmetic number, because the mean of its divisors is an integer number (503967744).

Almost surely, 2^11444812221 is an apocalyptic number.

It is an amenable number.

11444812221 is a deficient number, since it is larger than the sum of its proper divisors (4682155587).

11444812221 is a wasteful number, since it uses less digits than its factorization.

11444812221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561.

The product of its digits is 4096, while the sum is 30.

The spelling of 11444812221 in words is "eleven billion, four hundred forty-four million, eight hundred twelve thousand, two hundred twenty-one".