1109201820001 has 32 divisors (see below), whose sum is σ = 1303673978880. Its totient is φ = 933198657600.

The previous prime is 1109201819987. The next prime is 1109201820019. The reversal of 1109201820001 is 1000281029011.

It is not a de Polignac number, because 1109201820001 - 2⁵ = 1109201819969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109201820071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41578095 + ... + 41604763.

It is an arithmetic number, because the mean of its divisors is an integer number (40739811840).

Almost surely, 2^{1109201820001} is an apocalyptic number.

1109201820001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1109201820001 is a deficient number, since it is larger than the sum of its proper divisors (194472158879).

1109201820001 is a wasteful number, since it uses less digits than its factorization.

1109201820001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32037.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 1109201820001 its reverse (1000281029011), we get a palindrome (2109482849012).

The spelling of 1109201820001 in words is "one trillion, one hundred nine billion, two hundred one million, eight hundred twenty thousand, one".