1660002110121 has 16 divisors (see below), whose sum is σ = 2217272929344. Its totient is φ = 1104700215744.

The previous prime is 1660002110093. The next prime is 1660002110153. The reversal of 1660002110121 is 1210112000661.

It is not a de Polignac number, because 1660002110121 - 2⁹ = 1660002109609 is a prime.

It is a super-2 number, since 2×1660002110121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1660002111121) 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, 13154095 + ... + 13279691.

It is an arithmetic number, because the mean of its divisors is an integer number (138579558084).

Almost surely, 2^{1660002110121} is an apocalyptic number.

It is an amenable number.

1660002110121 is a deficient number, since it is larger than the sum of its proper divisors (557270819223).

1660002110121 is a wasteful number, since it uses less digits than its factorization.

1660002110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133400.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1660002110121 its reverse (1210112000661), we get a palindrome (2870114110782).

The spelling of 1660002110121 in words is "one trillion, six hundred sixty billion, two million, one hundred ten thousand, one hundred twenty-one".