1112257921 has 2 divisors, whose sum is σ = 1112257922. Its totient is φ = 1112257920.

The previous prime is 1112257919. The next prime is 1112257933. The reversal of 1112257921 is 1297522111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747256896 + 365001025 = 27336^2 + 19105^2 .

It is an emirp because it is prime and its reverse (1297522111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112257921 - 2¹ = 1112257919 is a prime.

Together with 1112257919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1112257981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556128960 + 556128961.

It is an arithmetic number, because the mean of its divisors is an integer number (556128961).

Almost surely, 2^1112257921 is an apocalyptic number.

It is an amenable number.

1112257921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112257921 is an equidigital number, since it uses as much as digits as its factorization.

1112257921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 31.

The square root of 1112257921 is about 33350.5310452472. The cubic root of 1112257921 is about 1036.1003866216.

The spelling of 1112257921 in words is "one billion, one hundred twelve million, two hundred fifty-seven thousand, nine hundred twenty-one".