121636065625 has 24 divisors (see below), whose sum is σ = 152242880832. Its totient is φ = 97176030000.

The previous prime is 121636065623. The next prime is 121636065637. The reversal of 121636065625 is 526560636121.

It is not a de Polignac number, because 121636065625 - 2¹ = 121636065623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121636065623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2295682 + ... + 2348068.

It is an arithmetic number, because the mean of its divisors is an integer number (6343453368).

Almost surely, 2^121636065625 is an apocalyptic number.

It is an amenable number.

121636065625 is a deficient number, since it is larger than the sum of its proper divisors (30606815207).

121636065625 is an frugal number, since it uses more digits than its factorization.

121636065625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53155 (or 53135 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 121636065625 in words is "one hundred twenty-one billion, six hundred thirty-six million, sixty-five thousand, six hundred twenty-five".