1112021021 has 2 divisors, whose sum is σ = 1112021022. Its totient is φ = 1112021020.

The previous prime is 1112021011. The next prime is 1112021039. The reversal of 1112021021 is 1201202111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628504900 + 483516121 = 25070^2 + 21989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112021021 is a prime.

It is a super-3 number, since 3×1112021021³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1112020993 and 1112021011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112021011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556010510 + 556010511.

It is an arithmetic number, because the mean of its divisors is an integer number (556010511).

Almost surely, 2^1112021021 is an apocalyptic number.

It is an amenable number.

1112021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112021021 is an equidigital number, since it uses as much as digits as its factorization.

1112021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1112021021 is about 33346.9791885262. The cubic root of 1112021021 is about 1036.0268216671.

Adding to 1112021021 its reverse (1201202111), we get a palindrome (2313223132).

The spelling of 1112021021 in words is "one billion, one hundred twelve million, twenty-one thousand, twenty-one".