10202123010221 has 2 divisors, whose sum is σ = 10202123010222. Its totient is φ = 10202123010220.

The previous prime is 10202123010199. The next prime is 10202123010223. The reversal of 10202123010221 is 12201032120201.

10202123010221 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., 10002108337321 + 200014672900 = 3162611^2 + 447230^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202123010221 - 2¹⁴ = 10202122993837 is a prime.

Together with 10202123010223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10202123010221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202123010223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101061505110 + 5101061505111.

It is an arithmetic number, because the mean of its divisors is an integer number (5101061505111).

Almost surely, 2^{10202123010221} is an apocalyptic number.

It is an amenable number.

10202123010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202123010221 is an equidigital number, since it uses as much as digits as its factorization.

10202123010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 10202123010221 its reverse (12201032120201), we get a palindrome (22403155130422).

The spelling of 10202123010221 in words is "ten trillion, two hundred two billion, one hundred twenty-three million, ten thousand, two hundred twenty-one".