120121101209 has 4 divisors (see below), whose sum is σ = 120122267316. Its totient is φ = 120119935104.

The previous prime is 120121101103. The next prime is 120121101211. The reversal of 120121101209 is 902101121021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902101121021 = 1051 ⋅858326471.

It can be written as a sum of positive squares in 2 ways, for example, as 43150921984 + 76970179225 = 207728^2 + 277435^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121101209 - 2²⁴ = 120104323993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120121101239) 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 3 ways as a sum of consecutive naturals, for example, 411764 + ... + 640149.

It is an arithmetic number, because the mean of its divisors is an integer number (30030566829).

Almost surely, 2^120121101209 is an apocalyptic number.

It is an amenable number.

120121101209 is a deficient number, since it is larger than the sum of its proper divisors (1166107).

120121101209 is a wasteful number, since it uses less digits than its factorization.

120121101209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166106.

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

The spelling of 120121101209 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred nine".