12125738707621 has 16 divisors (see below), whose sum is σ = 15157276213248. Its totient is φ = 9423957495600.

The previous prime is 12125738707597. The next prime is 12125738707661. The reversal of 12125738707621 is 12670783752121.

12125738707621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12125738707621 - 2¹¹ = 12125738705573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125738707661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205554225 + ... + 205613206.

It is an arithmetic number, because the mean of its divisors is an integer number (947329763328).

Almost surely, 2^{12125738707621} is an apocalyptic number.

12125738707621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12125738707621 is a deficient number, since it is larger than the sum of its proper divisors (3031537505627).

12125738707621 is a wasteful number, since it uses less digits than its factorization.

12125738707621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411167832.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 12125738707621 in words is "twelve trillion, one hundred twenty-five billion, seven hundred thirty-eight million, seven hundred seven thousand, six hundred twenty-one".