2128061042181 has 12 divisors (see below), whose sum is σ = 3073905934060. Its totient is φ = 1418688907200.

The previous prime is 2128061042161. The next prime is 2128061042201. The reversal of 2128061042181 is 1812401608212.

2128061042181 is a `hidden beast` number, since 2 + 1 + 28 + 0 + 610 + 4 + 2 + 18 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2128061042161) and next prime (2128061042201).

It can be written as a sum of positive squares in 2 ways, for example, as 794832873156 + 1333228169025 = 891534^2 + 1154655^2 .

It is not a de Polignac number, because 2128061042181 - 2¹⁵ = 2128061009413 is a prime.

It is a super-2 number, since 2×2128061042181² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128061042141) 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, 788296 + ... + 2208513.

Almost surely, 2^{2128061042181} is an apocalyptic number.

It is an amenable number.

2128061042181 is a deficient number, since it is larger than the sum of its proper divisors (945844891879).

2128061042181 is a wasteful number, since it uses less digits than its factorization.

2128061042181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075716 (or 3075713 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 2128061042181 in words is "two trillion, one hundred twenty-eight billion, sixty-one million, forty-two thousand, one hundred eighty-one".