1112542121 has 2 divisors, whose sum is σ = 1112542122. Its totient is φ = 1112542120.

The previous prime is 1112542117. The next prime is 1112542129. The reversal of 1112542121 is 1212452111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790734400 + 321807721 = 28120^2 + 17939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112542121 - 2² = 1112542117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1112542093 and 1112542102.

It is not a weakly prime, because it can be changed into another prime (1112542129) 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, 556271060 + 556271061.

It is an arithmetic number, because the mean of its divisors is an integer number (556271061).

Almost surely, 2^1112542121 is an apocalyptic number.

It is an amenable number.

1112542121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112542121 is an equidigital number, since it uses as much as digits as its factorization.

1112542121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 20.

The square root of 1112542121 is about 33354.7915748247. The cubic root of 1112542121 is about 1036.1886259433.

Adding to 1112542121 its reverse (1212452111), we get a palindrome (2324994232).

The spelling of 1112542121 in words is "one billion, one hundred twelve million, five hundred forty-two thousand, one hundred twenty-one".