21161002145041 has 32 divisors (see below), whose sum is σ = 23851213626240. Its totient is φ = 18604891814400.

The previous prime is 21161002145039. The next prime is 21161002145053. The reversal of 21161002145041 is 14054120016112.

It is a cyclic number.

It is not a de Polignac number, because 21161002145041 - 2¹ = 21161002145039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21161002145081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153821610 + ... + 153959116.

It is an arithmetic number, because the mean of its divisors is an integer number (745350425820).

Almost surely, 2^{21161002145041} is an apocalyptic number.

It is an amenable number.

21161002145041 is a deficient number, since it is larger than the sum of its proper divisors (2690211481199).

21161002145041 is a wasteful number, since it uses less digits than its factorization.

21161002145041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139825.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 21161002145041 in words is "twenty-one trillion, one hundred sixty-one billion, two million, one hundred forty-five thousand, forty-one".