2121611160681 has 12 divisors (see below), whose sum is σ = 3225841531120. Its totient is φ = 1339964943480.

The previous prime is 2121611160659. The next prime is 2121611160749. The reversal of 2121611160681 is 1860611161212.

2121611160681 is a `hidden beast` number, since 2 + 1 + 21 + 611 + 16 + 0 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 2121611160681 - 2¹¹ = 2121611158633 is a prime.

It is a super-2 number, since 2×2121611160681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121611160611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6203541235 + ... + 6203541576.

Almost surely, 2^{2121611160681} is an apocalyptic number.

It is an amenable number.

2121611160681 is a deficient number, since it is larger than the sum of its proper divisors (1104230370439).

2121611160681 is a wasteful number, since it uses less digits than its factorization.

2121611160681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12407082836 (or 12407082833 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 2121611160681 in words is "two trillion, one hundred twenty-one billion, six hundred eleven million, one hundred sixty thousand, six hundred eighty-one".