102102202022021 has 2 divisors, whose sum is σ = 102102202022022. Its totient is φ = 102102202022020.

The previous prime is 102102202022011. The next prime is 102102202022059. The reversal of 102102202022021 is 120220202201201.

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., 93235439222500 + 8866762799521 = 9655850^2 + 2977711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102202022021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102102202022011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051101011010 + 51051101011011.

It is an arithmetic number, because the mean of its divisors is an integer number (51051101011011).

Almost surely, 2^{102102202022021} is an apocalyptic number.

It is an amenable number.

102102202022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102202022021 is an equidigital number, since it uses as much as digits as its factorization.

102102202022021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102102202022021 its reverse (120220202201201), we get a palindrome (222322404223222).

The spelling of 102102202022021 in words is "one hundred two trillion, one hundred two billion, two hundred two million, twenty-two thousand, twenty-one".