10020002221 has 2 divisors, whose sum is σ = 10020002222. Its totient is φ = 10020002220.

The previous prime is 10020002219. The next prime is 10020002297. The reversal of 10020002221 is 12220002001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6191486596 + 3828515625 = 78686^2 + 61875^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020002221 - 2¹ = 10020002219 is a prime.

Together with 10020002219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 10020002198 and 10020002207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020002921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010001110 + 5010001111.

It is an arithmetic number, because the mean of its divisors is an integer number (5010001111).

Almost surely, 2^10020002221 is an apocalyptic number.

It is an amenable number.

10020002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020002221 is an equidigital number, since it uses as much as digits as its factorization.

10020002221 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 10.

Adding to 10020002221 its reverse (12220002001), we get a palindrome (22240004222).

The spelling of 10020002221 in words is "ten billion, twenty million, two thousand, two hundred twenty-one".