120131515215 has 24 divisors (see below), whose sum is σ = 208312217568. Its totient is φ = 64044216000.

The previous prime is 120131515193. The next prime is 120131515219. The reversal of 120131515215 is 512515131021.

It is a happy number.

120131515215 is a `hidden beast` number, since 1 + 2 + 0 + 131 + 5 + 1 + 521 + 5 = 666.

It is not a de Polignac number, because 120131515215 - 2⁵ = 120131515183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120131515219) 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 in 23 ways as a sum of consecutive naturals, for example, 427411 + ... + 650340.

It is an arithmetic number, because the mean of its divisors is an integer number (8679675732).

Almost surely, 2^120131515215 is an apocalyptic number.

120131515215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120131515215 is a deficient number, since it is larger than the sum of its proper divisors (88180702353).

120131515215 is a wasteful number, since it uses less digits than its factorization.

120131515215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080239 (or 1080236 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 120131515215 its reverse (512515131021), we get a palindrome (632646646236).

The spelling of 120131515215 in words is "one hundred twenty billion, one hundred thirty-one million, five hundred fifteen thousand, two hundred fifteen".