1111110220221 has 4 divisors (see below), whose sum is σ = 1481480293632. Its totient is φ = 740740146812.

The previous prime is 1111110220183. The next prime is 1111110220237. The reversal of 1111110220221 is 1220220111111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111110220221 - 2¹⁴ = 1111110203837 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111110220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111110220721) 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, 185185036701 + ... + 185185036706.

It is an arithmetic number, because the mean of its divisors is an integer number (370370073408).

Almost surely, 2^{1111110220221} is an apocalyptic number.

It is an amenable number.

1111110220221 is a deficient number, since it is larger than the sum of its proper divisors (370370073411).

1111110220221 is an equidigital number, since it uses as much as digits as its factorization.

1111110220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370370073410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111110220221 its reverse (1220220111111), we get a palindrome (2331330331332).

It can be divided in two parts, 1111110 and 220221, that added together give a palindrome (1331331).

The spelling of 1111110220221 in words is "one trillion, one hundred eleven billion, one hundred ten million, two hundred twenty thousand, two hundred twenty-one".