1112220121 has 4 divisors (see below), whose sum is σ = 1177644852. Its totient is φ = 1046795392.

The previous prime is 1112220107. The next prime is 1112220143. The reversal of 1112220121 is 1210222111.

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 838681600 + 273538521 = 28960^2 + 16539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112220121 - 2¹¹ = 1112218073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1112220101) 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 3 ways as a sum of consecutive naturals, for example, 32712340 + ... + 32712373.

It is an arithmetic number, because the mean of its divisors is an integer number (294411213).

Almost surely, 2^1112220121 is an apocalyptic number.

It is an amenable number.

1112220121 is a deficient number, since it is larger than the sum of its proper divisors (65424731).

1112220121 is an equidigital number, since it uses as much as digits as its factorization.

1112220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65424730.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1112220121 is about 33349.9643328145. The cubic root of 1112220121 is about 1036.0886492246.

Adding to 1112220121 its reverse (1210222111), we get a palindrome (2322442232).

The spelling of 1112220121 in words is "one billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-one".