121672717725 has 24 divisors (see below), whose sum is σ = 216639835552. Its totient is φ = 59900414400.

The previous prime is 121672717709. The next prime is 121672717757. The reversal of 121672717725 is 527717276121.

It is not a de Polignac number, because 121672717725 - 2⁴ = 121672717709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 62395291 + ... + 62397240.

Almost surely, 2^121672717725 is an apocalyptic number.

121672717725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121672717725 is a deficient number, since it is larger than the sum of its proper divisors (94967117827).

121672717725 is a wasteful number, since it uses less digits than its factorization.

121672717725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124792557 (or 124792552 counting only the distinct ones).

The product of its digits is 576240, while the sum is 48.

The spelling of 121672717725 in words is "one hundred twenty-one billion, six hundred seventy-two million, seven hundred seventeen thousand, seven hundred twenty-five".