120312515140 has 12 divisors (see below), whose sum is σ = 252656281836. Its totient is φ = 48125006048.

The previous prime is 120312515131. The next prime is 120312515171. The reversal of 120312515140 is 41515213021.

It can be written as a sum of positive squares in 2 ways, for example, as 77948172864 + 42364342276 = 279192^2 + 205826^2 .

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, 3007812859 + ... + 3007812898.

It is an arithmetic number, because the mean of its divisors is an integer number (21054690153).

Almost surely, 2^120312515140 is an apocalyptic number.

120312515140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120312515140 is an abundant number, since it is smaller than the sum of its proper divisors (132343766696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120312515140 is a wasteful number, since it uses less digits than its factorization.

120312515140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015625766 (or 6015625764 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 120312515140 its reverse (41515213021), we get a palindrome (161827728161).

The spelling of 120312515140 in words is "one hundred twenty billion, three hundred twelve million, five hundred fifteen thousand, one hundred forty".