120000000121 has 2 divisors, whose sum is σ = 120000000122. Its totient is φ = 120000000120.

The previous prime is 120000000119. The next prime is 120000000149. The reversal of 120000000121 is 121000000021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106709368896 + 13290631225 = 326664^2 + 115285^2 .

It is an emirp because it is prime and its reverse (121000000021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120000000121 - 2¹ = 120000000119 is a prime.

Together with 120000000119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120000000151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000000060 + 60000000061.

It is an arithmetic number, because the mean of its divisors is an integer number (60000000061).

Almost surely, 2^120000000121 is an apocalyptic number.

It is an amenable number.

120000000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120000000121 is an equidigital number, since it uses as much as digits as its factorization.

120000000121 is an evil number, because the sum of its binary digits is even.

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

Adding to 120000000121 its reverse (121000000021), we get a palindrome (241000000142).

The spelling of 120000000121 in words is "one hundred twenty billion, one hundred twenty-one", and thus it is an aban number.