120000000000121 has 4 divisors (see below), whose sum is σ = 120235756385700. Its totient is φ = 119764243614544.

The previous prime is 120000000000079. The next prime is 120000000000143. The reversal of 120000000000121 is 121000000000021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72741043514896 + 47258956485225 = 8528836^2 + 6874515^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000000000121 - 2³³ = 119991410065529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120000000000161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117878192026 + ... + 117878193043.

It is an arithmetic number, because the mean of its divisors is an integer number (30058939096425).

Almost surely, 2^{120000000000121} is an apocalyptic number.

It is an amenable number.

120000000000121 is a deficient number, since it is larger than the sum of its proper divisors (235756385579).

120000000000121 is an equidigital number, since it uses as much as digits as its factorization.

120000000000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235756385578.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 120000000000121 its reverse (121000000000021), we get a palindrome (241000000000142).

The spelling of 120000000000121 in words is "one hundred twenty trillion, one hundred twenty-one", and thus it is an aban number.