120121120909 has 2 divisors, whose sum is σ = 120121120910. Its totient is φ = 120121120908.

The previous prime is 120121120891. The next prime is 120121120949. The reversal of 120121120909 is 909021121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116966052009 + 3155068900 = 342003^2 + 56170^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121120909 - 2¹¹ = 120121118861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121120949) 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 as a sum of consecutive naturals, namely, 60060560454 + 60060560455.

It is an arithmetic number, because the mean of its divisors is an integer number (60060560455).

Almost surely, 2^120121120909 is an apocalyptic number.

It is an amenable number.

120121120909 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121120909 is an equidigital number, since it uses as much as digits as its factorization.

120121120909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 120121120909 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, nine hundred nine".