12021001102921 has 2 divisors, whose sum is σ = 12021001102922. Its totient is φ = 12021001102920.

The previous prime is 12021001102909. The next prime is 12021001102949. The reversal of 12021001102921 is 12920110012021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11973426949696 + 47574153225 = 3460264^2 + 218115^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021001102921 - 2²⁵ = 12020967548489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021001102892 and 12021001102901.

It is not a weakly prime, because it can be changed into another prime (12021001102951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010500551460 + 6010500551461.

It is an arithmetic number, because the mean of its divisors is an integer number (6010500551461).

Almost surely, 2^{12021001102921} is an apocalyptic number.

It is an amenable number.

12021001102921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021001102921 is an equidigital number, since it uses as much as digits as its factorization.

12021001102921 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 12021001102921 its reverse (12920110012021), we get a palindrome (24941111114942).

The spelling of 12021001102921 in words is "twelve trillion, twenty-one billion, one million, one hundred two thousand, nine hundred twenty-one".