12100002121 has 2 divisors, whose sum is σ = 12100002122. Its totient is φ = 12100002120.

The previous prime is 12100002011. The next prime is 12100002139. The reversal of 12100002121 is 12120000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7535108025 + 4564894096 = 86805^2 + 67564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100002121 - 2⁹ = 12100001609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100002098 and 12100002107.

It is not a weakly prime, because it can be changed into another prime (12100002191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050001060 + 6050001061.

It is an arithmetic number, because the mean of its divisors is an integer number (6050001061).

Almost surely, 2^12100002121 is an apocalyptic number.

It is an amenable number.

12100002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100002121 is an equidigital number, since it uses as much as digits as its factorization.

12100002121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12100002121 its reverse (12120000121), we get a palindrome (24220002242).

It can be divided in two parts, 1210000 and 2121, that added together give a palindrome (1212121).

The spelling of 12100002121 in words is "twelve billion, one hundred million, two thousand, one hundred twenty-one".