1112021221 has 8 divisors (see below), whose sum is σ = 1178527320. Its totient is φ = 1045636608.

The previous prime is 1112021213. The next prime is 1112021231. The reversal of 1112021221 is 1221202111.

It can be written as a sum of positive squares in 4 ways, for example, as 205348900 + 906672321 = 14330^2 + 30111^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1112021221 - 2³ = 1112021213 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 (1112021231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11166 + ... + 48463.

It is an arithmetic number, because the mean of its divisors is an integer number (147315915).

Almost surely, 2^1112021221 is an apocalyptic number.

It is an amenable number.

1112021221 is a deficient number, since it is larger than the sum of its proper divisors (66506099).

1112021221 is a wasteful number, since it uses less digits than its factorization.

1112021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60743.

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

The square root of 1112021221 is about 33346.9821872984. The cubic root of 1112021221 is about 1036.0268837779.

Adding to 1112021221 its reverse (1221202111), we get a palindrome (2333223332).

The spelling of 1112021221 in words is "one billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".