12123054525 has 48 divisors (see below), whose sum is σ = 20883806208. Its totient is φ = 6198456000.

The previous prime is 12123054523. The next prime is 12123054529. The reversal of 12123054525 is 52545032121.

It is not a de Polignac number, because 12123054525 - 2¹ = 12123054523 is a prime.

It is a super-2 number, since 2×12123054525² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 12123054492 and 12123054501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123054523) 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, 224410 + ... + 273140.

It is an arithmetic number, because the mean of its divisors is an integer number (435079296).

Almost surely, 2^12123054525 is an apocalyptic number.

12123054525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12123054525 is a deficient number, since it is larger than the sum of its proper divisors (8760751683).

12123054525 is a wasteful number, since it uses less digits than its factorization.

12123054525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48882 (or 48877 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 12123054525 its reverse (52545032121), we get a palindrome (64668086646).

The spelling of 12123054525 in words is "twelve billion, one hundred twenty-three million, fifty-four thousand, five hundred twenty-five".