111422021 has 2 divisors, whose sum is σ = 111422022. Its totient is φ = 111422020.

The previous prime is 111422009. The next prime is 111422033. The reversal of 111422021 is 120224111.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (111422009) and next prime (111422033).

It can be written as a sum of positive squares in only one way, i.e., 110481121 + 940900 = 10511^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 111422021 - 2⁶ = 111421957 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111421987 and 111422005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111422071) 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 as a sum of consecutive naturals, namely, 55711010 + 55711011.

It is an arithmetic number, because the mean of its divisors is an integer number (55711011).

Almost surely, 2^111422021 is an apocalyptic number.

It is an amenable number.

111422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111422021 is an equidigital number, since it uses as much as digits as its factorization.

111422021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 111422021 is about 10555.6629824943. The cubic root of 111422021 is about 481.1978488268.

Adding to 111422021 its reverse (120224111), we get a palindrome (231646132).

The spelling of 111422021 in words is "one hundred eleven million, four hundred twenty-two thousand, twenty-one".