1112001001 has 2 divisors, whose sum is σ = 1112001002. Its totient is φ = 1112001000.

The previous prime is 1112000999. The next prime is 1112001029. The reversal of 1112001001 is 1001002111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096603225 + 15397776 = 33115^2 + 3924^2 .

It is an emirp because it is prime and its reverse (1001002111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112001001 - 2¹ = 1112000999 is a prime.

Together with 1112000999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1112001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556000500 + 556000501.

It is an arithmetic number, because the mean of its divisors is an integer number (556000501).

Almost surely, 2^1112001001 is an apocalyptic number.

It is an amenable number.

1112001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112001001 is an equidigital number, since it uses as much as digits as its factorization.

1112001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1112001001 is about 33346.6790100604. The cubic root of 1112001001 is about 1036.0206043442.

Adding to 1112001001 its reverse (1001002111), we get a palindrome (2113003112).

The spelling of 1112001001 in words is "one billion, one hundred twelve million, one thousand, one".