12212122012 has 12 divisors (see below), whose sum is σ = 21452474736. Its totient is φ = 6082843520.

The previous prime is 12212121949. The next prime is 12212122019. The reversal of 12212122012 is 21022121221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212122019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5803189 + ... + 5805292.

It is an arithmetic number, because the mean of its divisors is an integer number (1787706228).

Almost surely, 2^12212122012 is an apocalyptic number.

It is an amenable number.

12212122012 is a deficient number, since it is larger than the sum of its proper divisors (9240352724).

12212122012 is a wasteful number, since it uses less digits than its factorization.

12212122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608748 (or 11608746 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212122012 its reverse (21022121221), we get a palindrome (33234243233).

The spelling of 12212122012 in words is "twelve billion, two hundred twelve million, one hundred twenty-two thousand, twelve".