102110221109 has 4 divisors (see below), whose sum is σ = 109964853516. Its totient is φ = 94255588704.

The previous prime is 102110221099. The next prime is 102110221123. The reversal of 102110221109 is 901122011201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901122011201 = 3797 ⋅237324733.

It can be written as a sum of positive squares in 2 ways, for example, as 10726744900 + 91383476209 = 103570^2 + 302297^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110221109 - 2⁴ = 102110221093 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 (102110221139) 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, 3927316184 + ... + 3927316209.

It is an arithmetic number, because the mean of its divisors is an integer number (27491213379).

Almost surely, 2^102110221109 is an apocalyptic number.

It is an amenable number.

102110221109 is a deficient number, since it is larger than the sum of its proper divisors (7854632407).

102110221109 is an equidigital number, since it uses as much as digits as its factorization.

102110221109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854632406.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 102110221109 in words is "one hundred two billion, one hundred ten million, two hundred twenty-one thousand, one hundred nine".