102020100203221 has 2 divisors, whose sum is σ = 102020100203222. Its totient is φ = 102020100203220.

The previous prime is 102020100203213. The next prime is 102020100203291. The reversal of 102020100203221 is 122302001020201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99965003062500 + 2055097140721 = 9998250^2 + 1433561^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020100203221 - 2³ = 102020100203213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020100203195 and 102020100203204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020100203291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010050101610 + 51010050101611.

It is an arithmetic number, because the mean of its divisors is an integer number (51010050101611).

Almost surely, 2^{102020100203221} is an apocalyptic number.

It is an amenable number.

102020100203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020100203221 is an equidigital number, since it uses as much as digits as its factorization.

102020100203221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102020100203221 its reverse (122302001020201), we get a palindrome (224322101223422).

The spelling of 102020100203221 in words is "one hundred two trillion, twenty billion, one hundred million, two hundred three thousand, two hundred twenty-one".