120121020009 has 8 divisors (see below), whose sum is σ = 177957066720. Its totient is φ = 80080679988.

The previous prime is 120121019987. The next prime is 120121020017. The reversal of 120121020009 is 900020121021.

It is not a de Polignac number, because 120121020009 - 2¹³ = 120121011817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120121019973 and 120121020000.

It is not an unprimeable number, because it can be changed into a prime (120121020049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224463307 + ... + 2224463360.

It is an arithmetic number, because the mean of its divisors is an integer number (22244633340).

Almost surely, 2^120121020009 is an apocalyptic number.

It is an amenable number.

120121020009 is a deficient number, since it is larger than the sum of its proper divisors (57836046711).

120121020009 is an equidigital number, since it uses as much as digits as its factorization.

120121020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448926676 (or 4448926670 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 120121020009 in words is "one hundred twenty billion, one hundred twenty-one million, twenty thousand, nine".