12122121001121 has 4 divisors (see below), whose sum is σ = 12142563027012. Its totient is φ = 12101678975232.

The previous prime is 12122121001093. The next prime is 12122121001147. The reversal of 12122121001121 is 12110012122121.

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 6436566887521 + 5685554113600 = 2537039^2 + 2384440^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122121001121 - 2²⁶ = 12122053892257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122121001121.

It is not an unprimeable number, because it can be changed into a prime (12122121004121) 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, 10221012056 + ... + 10221013241.

It is an arithmetic number, because the mean of its divisors is an integer number (3035640756753).

Almost surely, 2^{12122121001121} is an apocalyptic number.

It is an amenable number.

12122121001121 is a deficient number, since it is larger than the sum of its proper divisors (20442025891).

12122121001121 is an equidigital number, since it uses as much as digits as its factorization.

12122121001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442025890.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12122121001121 its reverse (12110012122121), we get a palindrome (24232133123242).

The spelling of 12122121001121 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, one thousand, one hundred twenty-one".