1109191928201 has 4 divisors (see below), whose sum is σ = 1267647917952. Its totient is φ = 950735938452.

The previous prime is 1109191928191. The next prime is 1109191928219. The reversal of 1109191928201 is 1028291919011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1109191928201 - 2¹⁸ = 1109191666057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109191948201) 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, 79227994865 + ... + 79227994878.

It is an arithmetic number, because the mean of its divisors is an integer number (316911979488).

Almost surely, 2^{1109191928201} is an apocalyptic number.

It is an amenable number.

1109191928201 is a deficient number, since it is larger than the sum of its proper divisors (158455989751).

1109191928201 is an equidigital number, since it uses as much as digits as its factorization.

1109191928201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158455989750.

The product of its (nonzero) digits is 23328, while the sum is 44.

The spelling of 1109191928201 in words is "one trillion, one hundred nine billion, one hundred ninety-one million, nine hundred twenty-eight thousand, two hundred one".