112130021 has 2 divisors, whose sum is σ = 112130022. Its totient is φ = 112130020.

The previous prime is 112130009. The next prime is 112130027. The reversal of 112130021 is 120031211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109202500 + 2927521 = 10450^2 + 1711^2 .

It is an emirp because it is prime and its reverse (120031211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112130021 - 2¹⁰ = 112128997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 112129984 and 112130011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112130027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56065010 + 56065011.

It is an arithmetic number, because the mean of its divisors is an integer number (56065011).

Almost surely, 2^112130021 is an apocalyptic number.

It is an amenable number.

112130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

112130021 is an equidigital number, since it uses as much as digits as its factorization.

112130021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 112130021 is about 10589.1463773054. The cubic root of 112130021 is about 482.2149099314.

Adding to 112130021 its reverse (120031211), we get a palindrome (232161232).

The spelling of 112130021 in words is "one hundred twelve million, one hundred thirty thousand, twenty-one".