12006500161 has 4 divisors (see below), whose sum is σ = 12092878000. Its totient is φ = 11920122324.

The previous prime is 12006500153. The next prime is 12006500173. The reversal of 12006500161 is 16100560021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12006500161 - 2³ = 12006500153 is a prime.

It is a super-2 number, since 2×12006500161² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12006500861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43188711 + ... + 43188988.

It is an arithmetic number, because the mean of its divisors is an integer number (3023219500).

Almost surely, 2^12006500161 is an apocalyptic number.

It is an amenable number.

12006500161 is a deficient number, since it is larger than the sum of its proper divisors (86377839).

12006500161 is an equidigital number, since it uses as much as digits as its factorization.

12006500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86377838.

The product of its (nonzero) digits is 360, while the sum is 22.

The spelling of 12006500161 in words is "twelve billion, six million, five hundred thousand, one hundred sixty-one".