121212112012 has 24 divisors (see below), whose sum is σ = 224666519616.
Its totient is φ = 57023824128.
The previous prime is 121212112001. The next prime is 121212112019. The reversal of 121212112012 is 210211212121.
Adding to 121212112012 its reverse (210211212121), we get a palindrome (331423324133).
It is not an unprimeable number, because it can be changed into a prime (121212112019) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39283 + ... + 493930.
It is an arithmetic number, because the mean of its divisors is an integer number (9361104984).
Almost surely, 2121212112012 is an apocalyptic number.
It is an amenable number.
121212112012 is a deficient number, since it is larger than the sum of its proper divisors (103454407604).
121212112012 is a wasteful number, since it uses less digits than its factorization.
121212112012 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 536577 (or 536575 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 16.
The spelling of 121212112012 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, twelve".