12122102100121 has 4 divisors (see below), whose sum is σ = 13054571492452. Its totient is φ = 11189632707792.

The previous prime is 12122102100109. The next prime is 12122102100137. The reversal of 12122102100121 is 12100120122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1734921002896 + 10387181097225 = 1317164^2 + 3222915^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122102100121 - 2³⁹ = 11572346286233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122102100095 and 12122102100104.

It is not an unprimeable number, because it can be changed into a prime (12122102100151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466234696146 + ... + 466234696171.

It is an arithmetic number, because the mean of its divisors is an integer number (3263642873113).

Almost surely, 2^{12122102100121} is an apocalyptic number.

It is an amenable number.

12122102100121 is a deficient number, since it is larger than the sum of its proper divisors (932469392331).

12122102100121 is an equidigital number, since it uses as much as digits as its factorization.

12122102100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932469392330.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12122102100121 its reverse (12100120122121), we get a palindrome (24222222222242).

The spelling of 12122102100121 in words is "twelve trillion, one hundred twenty-two billion, one hundred two million, one hundred thousand, one hundred twenty-one".