102002211222221 has 2 divisors, whose sum is σ = 102002211222222. Its totient is φ = 102002211222220.

The previous prime is 102002211222173. The next prime is 102002211222257. The reversal of 102002211222221 is 122222112200201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76883961722500 + 25118249499721 = 8768350^2 + 5011811^2 .

It is a cyclic number.

It is not a de Polignac number, because 102002211222221 - 2³⁰ = 102001137480397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002211222193 and 102002211222202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102002211222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51001105611110 + 51001105611111.

It is an arithmetic number, because the mean of its divisors is an integer number (51001105611111).

Almost surely, 2^{102002211222221} is an apocalyptic number.

It is an amenable number.

102002211222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102002211222221 is an equidigital number, since it uses as much as digits as its factorization.

102002211222221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 102002211222221 its reverse (122222112200201), we get a palindrome (224224323422422).

The spelling of 102002211222221 in words is "one hundred two trillion, two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".