109091819101 has 4 divisors (see below), whose sum is σ = 109092493692. Its totient is φ = 109091144512.

The previous prime is 109091819099. The next prime is 109091819131. The reversal of 109091819101 is 101918190901.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 101918190901 = 187423 ⋅543787.

It can be written as a sum of positive squares in 2 ways, for example, as 93678844900 + 15412974201 = 306070^2 + 124149^2 .

It is a cyclic number.

It is not a de Polignac number, because 109091819101 - 2¹ = 109091819099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109091819131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66075 + ... + 471751.

It is an arithmetic number, because the mean of its divisors is an integer number (27273123423).

Almost surely, 2^109091819101 is an apocalyptic number.

It is an amenable number.

109091819101 is a deficient number, since it is larger than the sum of its proper divisors (674591).

109091819101 is an equidigital number, since it uses as much as digits as its factorization.

109091819101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674590.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 109091819101 in words is "one hundred nine billion, ninety-one million, eight hundred nineteen thousand, one hundred one".