1112112021 has 4 divisors (see below), whose sum is σ = 1482816032. Its totient is φ = 741408012.

The previous prime is 1112112019. The next prime is 1112112037. The reversal of 1112112021 is 1202112111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1112112021 - 2¹ = 1112112019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1112111988 and 1112112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112112041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185352001 + ... + 185352006.

It is an arithmetic number, because the mean of its divisors is an integer number (370704008).

Almost surely, 2^1112112021 is an apocalyptic number.

It is an amenable number.

1112112021 is a deficient number, since it is larger than the sum of its proper divisors (370704011).

1112112021 is an equidigital number, since it uses as much as digits as its factorization.

1112112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370704010.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1112112021 is about 33348.3436020442. The cubic root of 1112112021 is about 1036.0550812855.

Adding to 1112112021 its reverse (1202112111), we get a palindrome (2314224132).

The spelling of 1112112021 in words is "one billion, one hundred twelve million, one hundred twelve thousand, twenty-one".