1112222212221 has 16 divisors (see below), whose sum is σ = 1587838723200. Its totient is φ = 690023735808.

The previous prime is 1112222212217. The next prime is 1112222212223. The reversal of 1112222212221 is 1222122222111.

It is not a de Polignac number, because 1112222212221 - 2² = 1112222212217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112222212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122513881 + ... + 122522958.

It is an arithmetic number, because the mean of its divisors is an integer number (99239920200).

Almost surely, 2^{1112222212221} is an apocalyptic number.

It is an amenable number.

1112222212221 is a deficient number, since it is larger than the sum of its proper divisors (475616510979).

1112222212221 is a wasteful number, since it uses less digits than its factorization.

1112222212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245036948.

The product of its digits is 256, while the sum is 21.

Adding to 1112222212221 its reverse (1222122222111), we get a palindrome (2334344434332).

The spelling of 1112222212221 in words is "one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".