12012102520 has 32 divisors (see below), whose sum is σ = 29484252720. Its totient is φ = 4368037120.

The previous prime is 12012102517. The next prime is 12012102523. The reversal of 12012102520 is 2520121021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12012102517) and next prime (12012102523).

It is a junction number, because it is equal to n+sod(n) for n = 12012102494 and 12012102503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012102523) by changing a digit.

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, 13649677 + ... + 13650556.

Almost surely, 2^12012102520 is an apocalyptic number.

12012102520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012102520 is an abundant number, since it is smaller than the sum of its proper divisors (17472150200).

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

12012102520 is a wasteful number, since it uses less digits than its factorization.

12012102520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27300255 (or 27300251 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 12012102520 its reverse (2520121021), we get a palindrome (14532223541).

The spelling of 12012102520 in words is "twelve billion, twelve million, one hundred two thousand, five hundred twenty".