12122120111212 has 6 divisors (see below), whose sum is σ = 21213710194628. Its totient is φ = 6061060055604.

The previous prime is 12122120111209. The next prime is 12122120111239. The reversal of 12122120111212 is 21211102122121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122120111212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515265013898 + ... + 1515265013905.

Almost surely, 2^{12122120111212} is an apocalyptic number.

It is an amenable number.

12122120111212 is a deficient number, since it is larger than the sum of its proper divisors (9091590083416).

12122120111212 is a wasteful number, since it uses less digits than its factorization.

12122120111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030530027807 (or 3030530027805 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122120111212 its reverse (21211102122121), we get a palindrome (33333222233333).

The spelling of 12122120111212 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, one hundred eleven thousand, two hundred twelve".