13520666121 has 8 divisors (see below), whose sum is σ = 18039984864. Its totient is φ = 9007562400.

The previous prime is 13520666119. The next prime is 13520666141. The reversal of 13520666121 is 12166602531.

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

It is not a de Polignac number, because 13520666121 - 2¹ = 13520666119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13520666101) 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, 1548676 + ... + 1557381.

It is an arithmetic number, because the mean of its divisors is an integer number (2254998108).

Almost surely, 2^13520666121 is an apocalyptic number.

It is an amenable number.

13520666121 is a deficient number, since it is larger than the sum of its proper divisors (4519318743).

13520666121 is a wasteful number, since it uses less digits than its factorization.

13520666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107511.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 13520666121 in words is "thirteen billion, five hundred twenty million, six hundred sixty-six thousand, one hundred twenty-one".