13660322121 has 6 divisors (see below), whose sum is σ = 19731576410. Its totient is φ = 9106881408.

The previous prime is 13660322119. The next prime is 13660322147. The reversal of 13660322121 is 12122306631.

13660322121 is a `hidden beast` number, since 1 + 36 + 603 + 2 + 2 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11350558521 + 2309763600 = 106539^2 + 48060^2 .

It is not a de Polignac number, because 13660322121 - 2¹ = 13660322119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13660322521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 758906776 + ... + 758906793.

Almost surely, 2^13660322121 is an apocalyptic number.

It is an amenable number.

13660322121 is a deficient number, since it is larger than the sum of its proper divisors (6071254289).

13660322121 is a wasteful number, since it uses less digits than its factorization.

13660322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517813575 (or 1517813572 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 13660322121 its reverse (12122306631), we get a palindrome (25782628752).

The spelling of 13660322121 in words is "thirteen billion, six hundred sixty million, three hundred twenty-two thousand, one hundred twenty-one".