20120002102109 has 32 divisors (see below), whose sum is σ = 24843872987136. Its totient is φ = 15867194745600.

The previous prime is 20120002102103. The next prime is 20120002102177. The reversal of 20120002102109 is 90120120002102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20120002102109 - 2⁴⁴ = 2527816057693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120002102103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312871259 + ... + 312935559.

It is an arithmetic number, because the mean of its divisors is an integer number (776371030848).

Almost surely, 2^{20120002102109} is an apocalyptic number.

It is an amenable number.

20120002102109 is a deficient number, since it is larger than the sum of its proper divisors (4723870885027).

20120002102109 is a wasteful number, since it uses less digits than its factorization.

20120002102109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75485.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20120002102109 in words is "twenty trillion, one hundred twenty billion, two million, one hundred two thousand, one hundred nine".