12122102021121 has 8 divisors (see below), whose sum is σ = 17958669660960. Its totient is φ = 8081401347396.

The previous prime is 12122102021087. The next prime is 12122102021123. The reversal of 12122102021121 is 12112020122121.

12122102021121 is a `hidden beast` number, since 121 + 221 + 0 + 202 + 1 + 121 = 666.

It is not a de Polignac number, because 12122102021121 - 2⁷ = 12122102020993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122102021094 and 12122102021103.

It is not an unprimeable number, because it can be changed into a prime (12122102021123) 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 7 ways as a sum of consecutive naturals, for example, 224483370735 + ... + 224483370788.

It is an arithmetic number, because the mean of its divisors is an integer number (2244833707620).

Almost surely, 2^{12122102021121} is an apocalyptic number.

It is an amenable number.

12122102021121 is a deficient number, since it is larger than the sum of its proper divisors (5836567639839).

12122102021121 is an equidigital number, since it uses as much as digits as its factorization.

12122102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448966741532 (or 448966741526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12122102021121 its reverse (12112020122121), we get a palindrome (24234122143242).

The spelling of 12122102021121 in words is "twelve trillion, one hundred twenty-two billion, one hundred two million, twenty-one thousand, one hundred twenty-one".