12162212071 has 4 divisors (see below), whose sum is σ = 12164650000. Its totient is φ = 12159774144.

The previous prime is 12162212059. The next prime is 12162212089. The reversal of 12162212071 is 17021226121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12162212071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12162212011) 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, 1211466 + ... + 1221463.

It is an arithmetic number, because the mean of its divisors is an integer number (3041162500).

Almost surely, 2^12162212071 is an apocalyptic number.

12162212071 is a deficient number, since it is larger than the sum of its proper divisors (2437929).

12162212071 is an equidigital number, since it uses as much as digits as its factorization.

12162212071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437928.

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

Adding to 12162212071 its reverse (17021226121), we get a palindrome (29183438192).

The spelling of 12162212071 in words is "twelve billion, one hundred sixty-two million, two hundred twelve thousand, seventy-one".