10020201212221 has 2 divisors, whose sum is σ = 10020201212222. Its totient is φ = 10020201212220.

The previous prime is 10020201212213. The next prime is 10020201212237. The reversal of 10020201212221 is 12221210202001.

It is a happy number.

It is an a-pointer prime, because the next prime (10020201212237) can be obtained adding 10020201212221 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9681027759225 + 339173452996 = 3111435^2 + 582386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020201212221 - 2³ = 10020201212213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10020201212195 and 10020201212204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020201213221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010100606110 + 5010100606111.

It is an arithmetic number, because the mean of its divisors is an integer number (5010100606111).

Almost surely, 2^{10020201212221} is an apocalyptic number.

It is an amenable number.

10020201212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020201212221 is an equidigital number, since it uses as much as digits as its factorization.

10020201212221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10020201212221 its reverse (12221210202001), we get a palindrome (22241411414222).

The spelling of 10020201212221 in words is "ten trillion, twenty billion, two hundred one million, two hundred twelve thousand, two hundred twenty-one".