111220221109 has 8 divisors (see below), whose sum is σ = 112308509720. Its totient is φ = 110133167616.

The previous prime is 111220221107. The next prime is 111220221121. The reversal of 111220221109 is 901122022111.

It can be written as a sum of positive squares in 4 ways, for example, as 49174393009 + 62045828100 = 221753^2 + 249090^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111220221109 - 2¹ = 111220221107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111220221109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220221103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127284 + ... + 488509.

It is an arithmetic number, because the mean of its divisors is an integer number (14038563715).

Almost surely, 2^111220221109 is an apocalyptic number.

It is an amenable number.

111220221109 is a deficient number, since it is larger than the sum of its proper divisors (1088288611).

111220221109 is a wasteful number, since it uses less digits than its factorization.

111220221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617559.

The product of its (nonzero) digits is 144, while the sum is 22.

It can be divided in two parts, 1112202 and 21109, that added together give a palindrome (1133311).

The spelling of 111220221109 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred nine".