1112126921 has 2 divisors, whose sum is σ = 1112126922. Its totient is φ = 1112126920.

The previous prime is 1112126881. The next prime is 1112126933. The reversal of 1112126921 is 1296212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876811321 + 235315600 = 29611^2 + 15340^2 .

It is an emirp because it is prime and its reverse (1296212111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112126921 - 2¹⁸ = 1111864777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1112120921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556063460 + 556063461.

It is an arithmetic number, because the mean of its divisors is an integer number (556063461).

Almost surely, 2^1112126921 is an apocalyptic number.

It is an amenable number.

1112126921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112126921 is an equidigital number, since it uses as much as digits as its factorization.

1112126921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The square root of 1112126921 is about 33348.5670006973. The cubic root of 1112126921 is about 1036.0597082630.

The spelling of 1112126921 in words is "one billion, one hundred twelve million, one hundred twenty-six thousand, nine hundred twenty-one".