121340545525 has 12 divisors (see below), whose sum is σ = 150707747812. Its totient is φ = 96914067840.

The previous prime is 121340545517. The next prime is 121340545589. The reversal of 121340545525 is 525545043121.

It can be written as a sum of positive squares in 6 ways, for example, as 43975348209 + 77365197316 = 209703^2 + 278146^2 .

It is not a de Polignac number, because 121340545525 - 2³ = 121340545517 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 3943584 + ... + 3974233.

Almost surely, 2^121340545525 is an apocalyptic number.

It is an amenable number.

121340545525 is a deficient number, since it is larger than the sum of its proper divisors (29367202287).

121340545525 is an equidigital number, since it uses as much as digits as its factorization.

121340545525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7918440 (or 7918435 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 121340545525 its reverse (525545043121), we get a palindrome (646885588646).

The spelling of 121340545525 in words is "one hundred twenty-one billion, three hundred forty million, five hundred forty-five thousand, five hundred twenty-five".