12021123220525 has 24 divisors (see below), whose sum is σ = 15883556590440. Its totient is φ = 8993547663360.

The previous prime is 12021123220507. The next prime is 12021123220531. The reversal of 12021123220525 is 52502232112021.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 3486066144201 + 8535057076324 = 1867101^2 + 2921482^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12021123220525 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021123220493 and 12021123220502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90012880 + ... + 90146329.

It is an arithmetic number, because the mean of its divisors is an integer number (661814857935).

Almost surely, 2^{12021123220525} is an apocalyptic number.

It is an amenable number.

12021123220525 is a deficient number, since it is larger than the sum of its proper divisors (3862433369915).

12021123220525 is a wasteful number, since it uses less digits than its factorization.

12021123220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180159393 (or 180159388 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 12021123220525 its reverse (52502232112021), we get a palindrome (64523355332546).

The spelling of 12021123220525 in words is "twelve trillion, twenty-one billion, one hundred twenty-three million, two hundred twenty thousand, five hundred twenty-five".