13887974129121 has 12 divisors (see below), whose sum is σ = 20400413975760. Its totient is φ = 9101723157720.

The previous prime is 13887974129087. The next prime is 13887974129123. The reversal of 13887974129121 is 12192147978831.

13887974129121 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 7 + 97 + 412 + 9 + 121 = 666.

It is not a de Polignac number, because 13887974129121 - 2⁷ = 13887974128993 is a prime.

It is a super-2 number, since 2×13887974129121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13887974129123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13077187915 + ... + 13077188976.

It is an arithmetic number, because the mean of its divisors is an integer number (1700034497980).

Almost surely, 2^{13887974129121} is an apocalyptic number.

It is an amenable number.

13887974129121 is a deficient number, since it is larger than the sum of its proper divisors (6512439846639).

13887974129121 is a wasteful number, since it uses less digits than its factorization.

13887974129121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26154376956 (or 26154376953 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 13887974129121 in words is "thirteen trillion, eight hundred eighty-seven billion, nine hundred seventy-four million, one hundred twenty-nine thousand, one hundred twenty-one".