12122121112 has 32 divisors (see below), whose sum is σ = 23983711200. Its totient is φ = 5732387584.

The previous prime is 12122121103. The next prime is 12122121149. The reversal of 12122121112 is 21112122121.

It is a super-2 number, since 2×12122121112² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353743 + ... + 386494.

It is an arithmetic number, because the mean of its divisors is an integer number (749490975).

Almost surely, 2^12122121112 is an apocalyptic number.

It is an amenable number.

12122121112 is a deficient number, since it is larger than the sum of its proper divisors (11861590088).

12122121112 is a wasteful number, since it uses less digits than its factorization.

12122121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740355 (or 740351 counting only the distinct ones).

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

Adding to 12122121112 its reverse (21112122121), we get a palindrome (33234243233).

The spelling of 12122121112 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".