1112222243221 has 4 divisors (see below), whose sum is σ = 1123688452012. Its totient is φ = 1100756034432.

The previous prime is 1112222243213. The next prime is 1112222243281. The reversal of 1112222243221 is 1223422222111.

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 623327619121 + 488894624100 = 789511^2 + 699210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112222243221 - 2³ = 1112222243213 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 (1112222243201) 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, 5733104250 + ... + 5733104443.

It is an arithmetic number, because the mean of its divisors is an integer number (280922113003).

Almost surely, 2^{1112222243221} is an apocalyptic number.

It is an amenable number.

1112222243221 is a deficient number, since it is larger than the sum of its proper divisors (11466208791).

1112222243221 is an equidigital number, since it uses as much as digits as its factorization.

1112222243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11466208790.

The product of its digits is 1536, while the sum is 25.

Adding to 1112222243221 its reverse (1223422222111), we get a palindrome (2335644465332).

The spelling of 1112222243221 in words is "one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred forty-three thousand, two hundred twenty-one".