109075499821 has 4 divisors (see below), whose sum is σ = 109091353792. Its totient is φ = 109059645852.

The previous prime is 109075499809. The next prime is 109075499873. The reversal of 109075499821 is 128994570901.

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 109075499821 - 2⁷ = 109075499693 is a prime.

It is a super-2 number, since 2×109075499821² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109075499891) 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, 7916661 + ... + 7930426.

It is an arithmetic number, because the mean of its divisors is an integer number (27272838448).

Almost surely, 2^109075499821 is an apocalyptic number.

It is an amenable number.

109075499821 is a deficient number, since it is larger than the sum of its proper divisors (15853971).

109075499821 is an equidigital number, since it uses as much as digits as its factorization.

109075499821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15853970.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 109075499821 in words is "one hundred nine billion, seventy-five million, four hundred ninety-nine thousand, eight hundred twenty-one".