1112122021 has 2 divisors, whose sum is σ = 1112122022. Its totient is φ = 1112122020.

The previous prime is 1112122019. The next prime is 1112122027. The reversal of 1112122021 is 1202212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022080900 + 90041121 = 31970^2 + 9489^2 .

It is an emirp because it is prime and its reverse (1202212111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112122021 - 2¹ = 1112122019 is a prime.

Together with 1112122019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1112121992 and 1112122010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112122027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556061010 + 556061011.

It is an arithmetic number, because the mean of its divisors is an integer number (556061011).

Almost surely, 2^1112122021 is an apocalyptic number.

It is an amenable number.

1112122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112122021 is an equidigital number, since it uses as much as digits as its factorization.

1112122021 is an evil number, because the sum of its binary digits is even.

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

The square root of 1112122021 is about 33348.4935341913. The cubic root of 1112122021 is about 1036.0581866441.

Adding to 1112122021 its reverse (1202212111), we get a palindrome (2314334132).

The spelling of 1112122021 in words is "one billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".