120135717157172 has 12 divisors (see below), whose sum is σ = 212098013919876. Its totient is φ = 59536284608640.

The previous prime is 120135717157139. The next prime is 120135717157193. The reversal of 120135717157172 is 271751717531021.

It can be written as a sum of positive squares in 2 ways, for example, as 52090805020816 + 68044912136356 = 7217396^2 + 8248934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 120135717157172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132893491979 + ... + 132893492882.

It is an arithmetic number, because the mean of its divisors is an integer number (17674834493323).

Almost surely, 2^{120135717157172} is an apocalyptic number.

It is an amenable number.

120135717157172 is a deficient number, since it is larger than the sum of its proper divisors (91962296762704).

120135717157172 is a wasteful number, since it uses less digits than its factorization.

120135717157172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265786984978 (or 265786984976 counting only the distinct ones).

The product of its (nonzero) digits is 720300, while the sum is 50.

The spelling of 120135717157172 in words is "one hundred twenty trillion, one hundred thirty-five billion, seven hundred seventeen million, one hundred fifty-seven thousand, one hundred seventy-two".