102922021 has 2 divisors, whose sum is σ = 102922022. Its totient is φ = 102922020.

The previous prime is 102922007. The next prime is 102922037. The reversal of 102922021 is 120229201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78960996 + 23961025 = 8886^2 + 4895^2 .

It is an emirp because it is prime and its reverse (120229201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102922021 - 2⁹ = 102921509 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102922021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102922081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51461010 + 51461011.

It is an arithmetic number, because the mean of its divisors is an integer number (51461011).

Almost surely, 2^102922021 is an apocalyptic number.

It is an amenable number.

102922021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102922021 is an equidigital number, since it uses as much as digits as its factorization.

102922021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 102922021 is about 10145.0490881020. The cubic root of 102922021 is about 468.6364902991.

The spelling of 102922021 in words is "one hundred two million, nine hundred twenty-two thousand, twenty-one".