12155125140 has 48 divisors (see below), whose sum is σ = 37815946560. Its totient is φ = 3241366560.

The previous prime is 12155125109. The next prime is 12155125159. The reversal of 12155125140 is 4152155121.

It is a happy number.

12155125140 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 512 + 5 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11254206 + ... + 11255285.

It is an arithmetic number, because the mean of its divisors is an integer number (787832220).

Almost surely, 2^12155125140 is an apocalyptic number.

12155125140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155125140 is an abundant number, since it is smaller than the sum of its proper divisors (25660821420).

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

12155125140 is a wasteful number, since it uses less digits than its factorization.

12155125140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22509509 (or 22509501 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 12155125140 in words is "twelve billion, one hundred fifty-five million, one hundred twenty-five thousand, one hundred forty".