12122054138 has 16 divisors (see below), whose sum is σ = 18541426176. Its totient is φ = 5942744400.

The previous prime is 12122054123. The next prime is 12122054141. The reversal of 12122054138 is 83145022121.

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 12122054138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270506 + ... + 312117.

It is an arithmetic number, because the mean of its divisors is an integer number (1158839136).

Almost surely, 2^12122054138 is an apocalyptic number.

12122054138 is a deficient number, since it is larger than the sum of its proper divisors (6419372038).

12122054138 is a wasteful number, since it uses less digits than its factorization.

12122054138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582829.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 12122054138 its reverse (83145022121), we get a palindrome (95267076259).

The spelling of 12122054138 in words is "twelve billion, one hundred twenty-two million, fifty-four thousand, one hundred thirty-eight".