1112212221 has 16 divisors (see below), whose sum is σ = 1490596224. Its totient is φ = 737662464.

The previous prime is 1112212181. The next prime is 1112212223. The reversal of 1112212221 is 1222122111.

It is not a de Polignac number, because 1112212221 - 2¹⁰ = 1112211197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1112212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112212223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622896 + ... + 624678.

It is an arithmetic number, because the mean of its divisors is an integer number (93162264).

Almost surely, 2^1112212221 is an apocalyptic number.

It is an amenable number.

1112212221 is a deficient number, since it is larger than the sum of its proper divisors (378384003).

1112212221 is a wasteful number, since it uses less digits than its factorization.

1112212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740.

The product of its digits is 32, while the sum is 15.

The square root of 1112212221 is about 33349.8458916979. The cubic root of 1112212221 is about 1036.0861961371.

Adding to 1112212221 its reverse (1222122111), we get a palindrome (2334334332).

The spelling of 1112212221 in words is "one billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-one".