44111221111 has 4 divisors (see below), whose sum is σ = 44162573800. Its totient is φ = 44059868424.

The previous prime is 44111221097. The next prime is 44111221177. The reversal of 44111221111 is 11112211144.

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 44111221111 - 2²⁹ = 43574350199 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44111021111) 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, 25675056 + ... + 25676773.

It is an arithmetic number, because the mean of its divisors is an integer number (11040643450).

Almost surely, 2^44111221111 is an apocalyptic number.

44111221111 is a deficient number, since it is larger than the sum of its proper divisors (51352689).

44111221111 is an equidigital number, since it uses as much as digits as its factorization.

44111221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51352688.

The product of its digits is 64, while the sum is 19.

Adding to 44111221111 its reverse (11112211144), we get a palindrome (55223432255).

It can be divided in two parts, 44 and 111221111, that added together give a triangular number (111221155 = T₁₄₉₁₄).

The spelling of 44111221111 in words is "forty-four billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".