1112221112021 has 4 divisors (see below), whose sum is σ = 1113083969100. Its totient is φ = 1111358254944.

The previous prime is 1112221111993. The next prime is 1112221112027. The reversal of 1112221112021 is 1202111222111.

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 381856023025 + 730365088996 = 617945^2 + 854614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112221112021 - 2¹⁰ = 1112221110997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112221112027) 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, 431426606 + ... + 431429183.

It is an arithmetic number, because the mean of its divisors is an integer number (278270992275).

Almost surely, 2^{1112221112021} is an apocalyptic number.

It is an amenable number.

1112221112021 is a deficient number, since it is larger than the sum of its proper divisors (862857079).

1112221112021 is an equidigital number, since it uses as much as digits as its factorization.

1112221112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862857078.

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

Adding to 1112221112021 its reverse (1202111222111), we get a palindrome (2314332334132).

The spelling of 1112221112021 in words is "one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, twenty-one".