12125534420 has 24 divisors (see below), whose sum is σ = 25465955424. Its totient is φ = 4849769376.

The previous prime is 12125534417. The next prime is 12125534441. The reversal of 12125534420 is 2443552121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278147 + ... + 318773.

It is an arithmetic number, because the mean of its divisors is an integer number (1061081476).

Almost surely, 2^12125534420 is an apocalyptic number.

12125534420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12125534420 is an abundant number, since it is smaller than the sum of its proper divisors (13340421004).

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

12125534420 is a wasteful number, since it uses less digits than its factorization.

12125534420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55559 (or 55557 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 12125534420 in words is "twelve billion, one hundred twenty-five million, five hundred thirty-four thousand, four hundred twenty".