12001121212 has 24 divisors (see below), whose sum is σ = 21355789392. Its totient is φ = 5899555200.

The previous prime is 12001121207. The next prime is 12001121281. The reversal of 12001121212 is 21212110021.

It is a junction number, because it is equal to n+sod(n) for n = 12001121192 and 12001121201.

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, 607848 + ... + 627280.

It is an arithmetic number, because the mean of its divisors is an integer number (889824558).

Almost surely, 2^12001121212 is an apocalyptic number.

It is an amenable number.

12001121212 is a deficient number, since it is larger than the sum of its proper divisors (9354668180).

12001121212 is a wasteful number, since it uses less digits than its factorization.

12001121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22029 (or 22027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12001121212 its reverse (21212110021), we get a palindrome (33213231233).

The spelling of 12001121212 in words is "twelve billion, one million, one hundred twenty-one thousand, two hundred twelve".