12220750161 has 12 divisors (see below), whose sum is σ = 17764631092. Its totient is φ = 8095273056.

The previous prime is 12220750153. The next prime is 12220750207. The reversal of 12220750161 is 16105702221.

12220750161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6493136400 + 5727613761 = 80580^2 + 75681^2 .

It is not a de Polignac number, because 12220750161 - 2³ = 12220750153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12220750151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4322986 + ... + 4325811.

Almost surely, 2^12220750161 is an apocalyptic number.

It is an amenable number.

12220750161 is a deficient number, since it is larger than the sum of its proper divisors (5543880931).

12220750161 is a wasteful number, since it uses less digits than its factorization.

12220750161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648960 (or 8648957 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 12220750161 in words is "twelve billion, two hundred twenty million, seven hundred fifty thousand, one hundred sixty-one".