1110091001 has 2 divisors, whose sum is σ = 1110091002. Its totient is φ = 1110091000.

The previous prime is 1110090991. The next prime is 1110091009. The reversal of 1110091001 is 1001900111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964164601 + 145926400 = 31051^2 + 12080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110091001 - 2⁶ = 1110090937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1110091009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555045500 + 555045501.

It is an arithmetic number, because the mean of its divisors is an integer number (555045501).

Almost surely, 2^1110091001 is an apocalyptic number.

It is an amenable number.

1110091001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110091001 is an equidigital number, since it uses as much as digits as its factorization.

1110091001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 14.

The square root of 1110091001 is about 33318.0281679454. The cubic root of 1110091001 is about 1035.4270996682.

Adding to 1110091001 its reverse (1001900111), we get a palindrome (2111991112).

The spelling of 1110091001 in words is "one billion, one hundred ten million, ninety-one thousand, one".