1112222121 has 8 divisors (see below), whose sum is σ = 1483185120. Its totient is φ = 741370272.

The previous prime is 1112222107. The next prime is 1112222131. The reversal of 1112222121 is 1212222111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1112222121 - 2⁷ = 1112221993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1112222121.

It is not an unprimeable number, because it can be changed into a prime (1112222101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651 + ... + 47168.

It is an arithmetic number, because the mean of its divisors is an integer number (185398140).

Almost surely, 2^1112222121 is an apocalyptic number.

It is an amenable number.

1112222121 is a deficient number, since it is larger than the sum of its proper divisors (370962999).

1112222121 is an equidigital number, since it uses as much as digits as its factorization.

1112222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55575.

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

The square root of 1112222121 is about 33349.9943178406. The cubic root of 1112222121 is about 1036.0892702576.

Adding to 1112222121 its reverse (1212222111), we get a palindrome (2324444232).

The spelling of 1112222121 in words is "one billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".