120021011000109 has 6 divisors (see below), whose sum is σ = 173363682555726. Its totient is φ = 80014007333400.

The previous prime is 120021011000087. The next prime is 120021011000131. The reversal of 120021011000109 is 901000110120021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120021011000087) and next prime (120021011000131).

It can be written as a sum of positive squares in only one way, i.e., 94654900355625 + 25366110644484 = 9729075^2 + 5036478^2 .

It is not a de Polignac number, because 120021011000109 - 2²⁷ = 120020876782381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021011000091 and 120021011000100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021011005109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6667833944442 + ... + 6667833944459.

It is an arithmetic number, because the mean of its divisors is an integer number (28893947092621).

Almost surely, 2^{120021011000109} is an apocalyptic number.

It is an amenable number.

120021011000109 is a deficient number, since it is larger than the sum of its proper divisors (53342671555617).

120021011000109 is a wasteful number, since it uses less digits than its factorization.

120021011000109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335667888907 (or 13335667888904 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 120021011000109 in words is "one hundred twenty trillion, twenty-one billion, eleven million, one hundred nine", and thus it is an aban number.