10221001121021 has 2 divisors, whose sum is σ = 10221001121022. Its totient is φ = 10221001121020.

The previous prime is 10221001120987. The next prime is 10221001121053. The reversal of 10221001121021 is 12012110012201.

10221001121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6512122156996 + 3708878964025 = 2551886^2 + 1925845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221001121021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10221001120987 and 10221001121005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221001124021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110500560510 + 5110500560511.

It is an arithmetic number, because the mean of its divisors is an integer number (5110500560511).

Almost surely, 2^{10221001121021} is an apocalyptic number.

It is an amenable number.

10221001121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221001121021 is an equidigital number, since it uses as much as digits as its factorization.

10221001121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10221001121021 its reverse (12012110012201), we get a palindrome (22233111133222).

The spelling of 10221001121021 in words is "ten trillion, two hundred twenty-one billion, one million, one hundred twenty-one thousand, twenty-one".