12122121011212 has 48 divisors (see below), whose sum is σ = 23191261728768. Its totient is φ = 5519292053760.

The previous prime is 12122121011183. The next prime is 12122121011213. The reversal of 12122121011212 is 21211012122121.

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 12122121011212.

It is not an unprimeable number, because it can be changed into a prime (12122121011213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8952733 + ... + 10217419.

It is an arithmetic number, because the mean of its divisors is an integer number (483151286016).

Almost surely, 2^{12122121011212} is an apocalyptic number.

It is an amenable number.

12122121011212 is a deficient number, since it is larger than the sum of its proper divisors (11069140717556).

12122121011212 is a wasteful number, since it uses less digits than its factorization.

12122121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269286 (or 1269284 counting only the distinct ones).

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

Adding to 12122121011212 its reverse (21211012122121), we get a palindrome (33333133133333).

The spelling of 12122121011212 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, eleven thousand, two hundred twelve".