12103025550 has 96 divisors (see below), whose sum is σ = 37421961984. Its totient is φ = 2514912000.

The previous prime is 12103025531. The next prime is 12103025567. The reversal of 12103025550 is 5552030121.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12103025550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 512391 + ... + 535490.

It is an arithmetic number, because the mean of its divisors is an integer number (389812104).

Almost surely, 2^12103025550 is an apocalyptic number.

12103025550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12103025550 is an abundant number, since it is smaller than the sum of its proper divisors (25318936434).

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

12103025550 is a wasteful number, since it uses less digits than its factorization.

12103025550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047914 (or 1047909 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 12103025550 its reverse (5552030121), we get a palindrome (17655055671).

The spelling of 12103025550 in words is "twelve billion, one hundred three million, twenty-five thousand, five hundred fifty".