120511155121 has 6 divisors (see below), whose sum is σ = 140186445810. Its totient is φ = 103295275776.

The previous prime is 120511155113. The next prime is 120511155131. The reversal of 120511155121 is 121551115021.

It can be written as a sum of positive squares in only one way, i.e., 119931308721 + 579846400 = 346311^2 + 24080^2 .

It is not a de Polignac number, because 120511155121 - 2³ = 120511155113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120511155131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1229705616 + ... + 1229705713.

It is an arithmetic number, because the mean of its divisors is an integer number (23364407635).

Almost surely, 2^120511155121 is an apocalyptic number.

It is an amenable number.

120511155121 is a deficient number, since it is larger than the sum of its proper divisors (19675290689).

120511155121 is an equidigital number, since it uses as much as digits as its factorization.

120511155121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459411343 (or 2459411336 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 25.

The spelling of 120511155121 in words is "one hundred twenty billion, five hundred eleven million, one hundred fifty-five thousand, one hundred twenty-one".