12121112012 has 12 divisors (see below), whose sum is σ = 21264846456. Its totient is φ = 6045441600.

The previous prime is 12121111927. The next prime is 12121112027. The reversal of 12121112012 is 21021112121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3776798 + ... + 3780005.

It is an arithmetic number, because the mean of its divisors is an integer number (1772070538).

Almost surely, 2^12121112012 is an apocalyptic number.

It is an amenable number.

12121112012 is a deficient number, since it is larger than the sum of its proper divisors (9143734444).

12121112012 is a wasteful number, since it uses less digits than its factorization.

12121112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557208 (or 7557206 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121112012 its reverse (21021112121), we get a palindrome (33142224133).

The spelling of 12121112012 in words is "twelve billion, one hundred twenty-one million, one hundred twelve thousand, twelve".