12100434550 has 96 divisors (see below), whose sum is σ = 24172452864. Its totient is φ = 4495392000.

The previous prime is 12100434473. The next prime is 12100434551. The reversal of 12100434550 is 5543400121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100434551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12777177 + ... + 12778123.

It is an arithmetic number, because the mean of its divisors is an integer number (251796384).

Almost surely, 2^12100434550 is an apocalyptic number.

12100434550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12100434550 is a deficient number, since it is larger than the sum of its proper divisors (12072018314).

12100434550 is a wasteful number, since it uses less digits than its factorization.

12100434550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 12100434550 its reverse (5543400121), we get a palindrome (17643834671).

The spelling of 12100434550 in words is "twelve billion, one hundred million, four hundred thirty-four thousand, five hundred fifty".