102102021277 has 2 divisors, whose sum is σ = 102102021278. Its totient is φ = 102102021276.

The previous prime is 102102021167. The next prime is 102102021289. The reversal of 102102021277 is 772120201201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58205905081 + 43896116196 = 241259^2 + 209514^2 .

It is an emirp because it is prime and its reverse (772120201201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102021277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102102021677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051010638 + 51051010639.

It is an arithmetic number, because the mean of its divisors is an integer number (51051010639).

Almost surely, 2^102102021277 is an apocalyptic number.

It is an amenable number.

102102021277 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102021277 is an equidigital number, since it uses as much as digits as its factorization.

102102021277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 102102021277 its reverse (772120201201), we get a palindrome (874222222478).

The spelling of 102102021277 in words is "one hundred two billion, one hundred two million, twenty-one thousand, two hundred seventy-seven".