12122120222121 has 16 divisors (see below), whose sum is σ = 19892710108544. Its totient is φ = 6394085391744.

The previous prime is 12122120222087. The next prime is 12122120222129. The reversal of 12122120222121 is 12122202122121.

It is a de Polignac number, because none of the positive numbers 2^k-12122120222121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12122120222129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22201685116 + ... + 22201685661.

It is an arithmetic number, because the mean of its divisors is an integer number (1243294381784).

Almost surely, 2^{12122120222121} is an apocalyptic number.

It is an amenable number.

12122120222121 is a deficient number, since it is larger than the sum of its proper divisors (7770589886423).

12122120222121 is a wasteful number, since it uses less digits than its factorization.

12122120222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44403370800.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12122120222121 its reverse (12122202122121), we get a palindrome (24244322344242).

The spelling of 12122120222121 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".