101853921109 has 4 divisors (see below), whose sum is σ = 101962624204. Its totient is φ = 101745218016.

The previous prime is 101853921061. The next prime is 101853921121. The reversal of 101853921109 is 901129358101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2332600209 + 99521320900 = 48297^2 + 315470^2 .

It is a cyclic number.

It is not a de Polignac number, because 101853921109 - 2¹³ = 101853912917 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 (101853921199) 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, 54350142 + ... + 54352015.

It is an arithmetic number, because the mean of its divisors is an integer number (25490656051).

Almost surely, 2^101853921109 is an apocalyptic number.

It is an amenable number.

101853921109 is a deficient number, since it is larger than the sum of its proper divisors (108703095).

101853921109 is an equidigital number, since it uses as much as digits as its factorization.

101853921109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108703094.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 101853921109 in words is "one hundred one billion, eight hundred fifty-three million, nine hundred twenty-one thousand, one hundred nine".