12122112122121 has 32 divisors (see below), whose sum is σ = 16435588055040. Its totient is φ = 7945669166400.

The previous prime is 12122112122093. The next prime is 12122112122137. The reversal of 12122112122121 is 12122121122121.

12122112122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12122112122121 - 2⁵ = 12122112122089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122112122161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172686396 + ... + 172756578.

It is an arithmetic number, because the mean of its divisors is an integer number (513612126720).

Almost surely, 2^{12122112122121} is an apocalyptic number.

It is an amenable number.

12122112122121 is a deficient number, since it is larger than the sum of its proper divisors (4313475932919).

12122112122121 is a wasteful number, since it uses less digits than its factorization.

12122112122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72477.

The product of its digits is 128, while the sum is 21.

Adding to 12122112122121 its reverse (12122121122121), we get a palindrome (24244233244242).

Subtracting 12122112122121 from its reverse (12122121122121), we obtain a square (9000000 = 3000²).

The spelling of 12122112122121 in words is "twelve trillion, one hundred twenty-two billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".