12122222012 has 12 divisors (see below), whose sum is σ = 21224621880. Its totient is φ = 6058044336.

The previous prime is 12122221981. The next prime is 12122222027. The reversal of 12122222012 is 21022222121.

It is a happy number.

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, 757763 + ... + 773594.

It is an arithmetic number, because the mean of its divisors is an integer number (1768718490).

Almost surely, 2^12122222012 is an apocalyptic number.

It is an amenable number.

12122222012 is a deficient number, since it is larger than the sum of its proper divisors (9102399868).

12122222012 is a wasteful number, since it uses less digits than its factorization.

12122222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533340 (or 1533338 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12122222012 its reverse (21022222121), we get a palindrome (33144444133).

The spelling of 12122222012 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, twelve".