10021122011221 has 2 divisors, whose sum is σ = 10021122011222. Its totient is φ = 10021122011220.

The previous prime is 10021122011213. The next prime is 10021122011311. The reversal of 10021122011221 is 12211022112001.

10021122011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6965666955025 + 3055455056196 = 2639255^2 + 1747986^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021122011221 - 2³ = 10021122011213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021122011195 and 10021122011204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021122018221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010561005610 + 5010561005611.

It is an arithmetic number, because the mean of its divisors is an integer number (5010561005611).

Almost surely, 2^{10021122011221} is an apocalyptic number.

It is an amenable number.

10021122011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021122011221 is an equidigital number, since it uses as much as digits as its factorization.

10021122011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10021122011221 its reverse (12211022112001), we get a palindrome (22232144123222).

The spelling of 10021122011221 in words is "ten trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".