10002002321221 has 2 divisors, whose sum is σ = 10002002321222. Its totient is φ = 10002002321220.

The previous prime is 10002002321141. The next prime is 10002002321249. The reversal of 10002002321221 is 12212320020001.

It is a happy number.

10002002321221 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., 7782766437121 + 2219235884100 = 2789761^2 + 1489710^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002002321221 - 2⁷ = 10002002321093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10002002321195 and 10002002321204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002002321261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001001160610 + 5001001160611.

It is an arithmetic number, because the mean of its divisors is an integer number (5001001160611).

Almost surely, 2^{10002002321221} is an apocalyptic number.

It is an amenable number.

10002002321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002002321221 is an equidigital number, since it uses as much as digits as its factorization.

10002002321221 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 16.

Adding to 10002002321221 its reverse (12212320020001), we get a palindrome (22214322341222).

The spelling of 10002002321221 in words is "ten trillion, two billion, two million, three hundred twenty-one thousand, two hundred twenty-one".