121752365525 has 24 divisors (see below), whose sum is σ = 174153049920. Its totient is φ = 82707068160.

The previous prime is 121752365521. The next prime is 121752365533. The reversal of 121752365525 is 525563257121.

It is a happy number.

It is not a de Polignac number, because 121752365525 - 2² = 121752365521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121752365521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3232340 + ... + 3269789.

It is an arithmetic number, because the mean of its divisors is an integer number (7256377080).

Almost surely, 2^121752365525 is an apocalyptic number.

It is an amenable number.

121752365525 is a deficient number, since it is larger than the sum of its proper divisors (52400684395).

121752365525 is a wasteful number, since it uses less digits than its factorization.

121752365525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502253 (or 6502248 counting only the distinct ones).

The product of its digits is 630000, while the sum is 44.

The spelling of 121752365525 in words is "one hundred twenty-one billion, seven hundred fifty-two million, three hundred sixty-five thousand, five hundred twenty-five".