1111110222221 has 4 divisors (see below), whose sum is σ = 1111156905852. Its totient is φ = 1111063538592.

The previous prime is 1111110222217. The next prime is 1111110222281. The reversal of 1111110222221 is 1222220111111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 212290562500 + 898819659721 = 460750^2 + 948061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111110222221 - 2² = 1111110222217 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 1111110222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111110222281) 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, 23306096 + ... + 23353721.

It is an arithmetic number, because the mean of its divisors is an integer number (277789226463).

Almost surely, 2^{1111110222221} is an apocalyptic number.

It is an amenable number.

1111110222221 is a deficient number, since it is larger than the sum of its proper divisors (46683631).

1111110222221 is an equidigital number, since it uses as much as digits as its factorization.

1111110222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46683630.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1111110222221 its reverse (1222220111111), we get a palindrome (2333330333332).

It can be divided in two parts, 1111110 and 222221, that added together give a palindrome (1333331).

The spelling of 1111110222221 in words is "one trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".