12122111212 has 6 divisors (see below), whose sum is σ = 21213694628. Its totient is φ = 6061055604.

The previous prime is 12122111179. The next prime is 12122111219. The reversal of 12122111212 is 21211122121.

12122111212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12122111212² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12122111219) 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 as a sum of consecutive naturals, namely, 1515263898 + ... + 1515263905.

Almost surely, 2^12122111212 is an apocalyptic number.

It is an amenable number.

12122111212 is a deficient number, since it is larger than the sum of its proper divisors (9091583416).

12122111212 is a wasteful number, since it uses less digits than its factorization.

12122111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030527807 (or 3030527805 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12122111212 its reverse (21211122121), we get a palindrome (33333233333).

The spelling of 12122111212 in words is "twelve billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twelve".