12212207161 has 16 divisors (see below), whose sum is σ = 15637115520. Its totient is φ = 9258814080.

The previous prime is 12212207143. The next prime is 12212207173. The reversal of 12212207161 is 16170221221.

It is a cyclic number.

It is not a de Polignac number, because 12212207161 - 2¹⁵ = 12212174393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212207191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2140396 + ... + 2146093.

It is an arithmetic number, because the mean of its divisors is an integer number (977319720).

Almost surely, 2^12212207161 is an apocalyptic number.

12212207161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212207161 is a deficient number, since it is larger than the sum of its proper divisors (3424908359).

12212207161 is a wasteful number, since it uses less digits than its factorization.

12212207161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286544.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 12212207161 its reverse (16170221221), we get a palindrome (28382428382).

The spelling of 12212207161 in words is "twelve billion, two hundred twelve million, two hundred seven thousand, one hundred sixty-one".