12012112122121 has 8 divisors (see below), whose sum is σ = 12718848234024. Its totient is φ = 11305391708160.

The previous prime is 12012112122071. The next prime is 12012112122137. The reversal of 12012112122121 is 12122121121021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 875742227721 + 11136369894400 = 935811^2 + 3337120^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012112122121 - 2⁷ = 12012112121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012112122181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2330560 + ... + 5427313.

It is an arithmetic number, because the mean of its divisors is an integer number (1589856029253).

Almost surely, 2^{12012112122121} is an apocalyptic number.

It is an amenable number.

12012112122121 is a deficient number, since it is larger than the sum of its proper divisors (706736111903).

12012112122121 is an equidigital number, since it uses as much as digits as its factorization.

12012112122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7848971.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12012112122121 its reverse (12122121121021), we get a palindrome (24134233243142).

The spelling of 12012112122121 in words is "twelve trillion, twelve billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".