1090101091 has 4 divisors (see below), whose sum is σ = 1094036752. Its totient is φ = 1086165432.

The previous prime is 1090101053. The next prime is 1090101109. The reversal of 1090101091 is 1901010901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1901010901 = 37 ⋅51378673.

It is a cyclic number.

It is not a de Polignac number, because 1090101091 - 2¹⁷ = 1089970019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090105091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967415 + ... + 1967968.

It is an arithmetic number, because the mean of its divisors is an integer number (273509188).

Almost surely, 2^1090101091 is an apocalyptic number.

1090101091 is a deficient number, since it is larger than the sum of its proper divisors (3935661).

1090101091 is an equidigital number, since it uses as much as digits as its factorization.

1090101091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935660.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 1090101091 is about 33016.6789819933. The cubic root of 1090101091 is about 1029.1742811969.

Adding to 1090101091 its reverse (1901010901), we get a palindrome (2991111992).

The spelling of 1090101091 in words is "one billion, ninety million, one hundred one thousand, ninety-one".