12111122021212 has 12 divisors (see below), whose sum is σ = 21228814373760. Its totient is φ = 6045746485856.

The previous prime is 12111122021171. The next prime is 12111122021287. The reversal of 12111122021212 is 21212022111121.

It is a happy number.

It is a super-2 number, since 2×12111122021212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12111122021212.

It is a congruent number.

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, 2453628412 + ... + 2453633347.

It is an arithmetic number, because the mean of its divisors is an integer number (1769067864480).

Almost surely, 2^{12111122021212} is an apocalyptic number.

It is an amenable number.

12111122021212 is a deficient number, since it is larger than the sum of its proper divisors (9117692352548).

12111122021212 is a wasteful number, since it uses less digits than its factorization.

12111122021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4907262380 (or 4907262378 counting only the distinct ones).

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

Adding to 12111122021212 its reverse (21212022111121), we get a palindrome (33323144132333).

The spelling of 12111122021212 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, twenty-one thousand, two hundred twelve".