102120210109 has 16 divisors (see below), whose sum is σ = 103716288000. Its totient is φ = 100537678384.

The previous prime is 102120210029. The next prime is 102120210113. The reversal of 102120210109 is 901012021201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102120210109 - 2¹⁹ = 102119685821 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 (102120210139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14545602 + ... + 14552620.

It is an arithmetic number, because the mean of its divisors is an integer number (6482268000).

Almost surely, 2^102120210109 is an apocalyptic number.

It is an amenable number.

102120210109 is a deficient number, since it is larger than the sum of its proper divisors (1596077891).

102120210109 is a wasteful number, since it uses less digits than its factorization.

102120210109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7952.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 102120210109 in words is "one hundred two billion, one hundred twenty million, two hundred ten thousand, one hundred nine".