1121112021 has 8 divisors (see below), whose sum is σ = 1523020320. Its totient is φ = 733305872.

The previous prime is 1121112007. The next prime is 1121112089. The reversal of 1121112021 is 1202111211.

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 1121112021 - 2¹⁰ = 1121110997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121111988 and 1121112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3525351 + ... + 3525668.

It is an arithmetic number, because the mean of its divisors is an integer number (190377540).

Almost surely, 2^1121112021 is an apocalyptic number.

It is an amenable number.

1121112021 is a deficient number, since it is larger than the sum of its proper divisors (401908299).

1121112021 is an equidigital number, since it uses as much as digits as its factorization.

1121112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051075.

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

The square root of 1121112021 is about 33483.0109309184. The cubic root of 1121112021 is about 1038.8424068302.

Adding to 1121112021 its reverse (1202111211), we get a palindrome (2323223232).

It can be divided in two parts, 11211 and 12021, that multiplied together give a palindrome (134767431).

The spelling of 1121112021 in words is "one billion, one hundred twenty-one million, one hundred twelve thousand, twenty-one".