13889670251221 has 8 divisors (see below), whose sum is σ = 13901572679904. Its totient is φ = 13877768569200.

The previous prime is 13889670251213. The next prime is 13889670251243. The reversal of 13889670251221 is 12215207698831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13889670251221 - 2³ = 13889670251213 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 (13889670251251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40892130 + ... + 41230396.

It is an arithmetic number, because the mean of its divisors is an integer number (1737696584988).

Almost surely, 2^{13889670251221} is an apocalyptic number.

It is an amenable number.

13889670251221 is a deficient number, since it is larger than the sum of its proper divisors (11902428683).

13889670251221 is a wasteful number, since it uses less digits than its factorization.

13889670251221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373331.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 13889670251221 in words is "thirteen trillion, eight hundred eighty-nine billion, six hundred seventy million, two hundred fifty-one thousand, two hundred twenty-one".