12001102210921 has 2 divisors, whose sum is σ = 12001102210922. Its totient is φ = 12001102210920.

The previous prime is 12001102210897. The next prime is 12001102211093. The reversal of 12001102210921 is 12901220110021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7407950280025 + 4593151930896 = 2721755^2 + 2143164^2 .

It is an emirp because it is prime and its reverse (12901220110021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12001102210921 - 2¹¹ = 12001102208873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001102210892 and 12001102210901.

It is not a weakly prime, because it can be changed into another prime (12001102210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000551105460 + 6000551105461.

It is an arithmetic number, because the mean of its divisors is an integer number (6000551105461).

Almost surely, 2^{12001102210921} is an apocalyptic number.

It is an amenable number.

12001102210921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001102210921 is an equidigital number, since it uses as much as digits as its factorization.

12001102210921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 12001102210921 its reverse (12901220110021), we get a palindrome (24902322320942).

The spelling of 12001102210921 in words is "twelve trillion, one billion, one hundred two million, two hundred ten thousand, nine hundred twenty-one".