2005571121 has 16 divisors (see below), whose sum is σ = 2734748736. Its totient is φ = 1307045376.

The previous prime is 2005571077. The next prime is 2005571143. The reversal of 2005571121 is 1211755002.

It is not a de Polignac number, because 2005571121 - 2¹⁷ = 2005440049 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2005571091 and 2005571100.

It is not an unprimeable number, because it can be changed into a prime (2005571021) 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, 15775 + ... + 65268.

It is an arithmetic number, because the mean of its divisors is an integer number (170921796).

Almost surely, 2^2005571121 is an apocalyptic number.

It is an amenable number.

2005571121 is a deficient number, since it is larger than the sum of its proper divisors (729177615).

2005571121 is a wasteful number, since it uses less digits than its factorization.

2005571121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81232.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 2005571121 is about 44783.6032605685. The cubic root of 2005571121 is about 1261.0898274354.

The spelling of 2005571121 in words is "two billion, five million, five hundred seventy-one thousand, one hundred twenty-one".