102184021 has 2 divisors, whose sum is σ = 102184022. Its totient is φ = 102184020.

The previous prime is 102184001. The next prime is 102184031. The reversal of 102184021 is 120481201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70980625 + 31203396 = 8425^2 + 5586^2 .

It is a cyclic number.

It is not a de Polignac number, because 102184021 - 2⁵ = 102183989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102184021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102184001) 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, 51092010 + 51092011.

It is an arithmetic number, because the mean of its divisors is an integer number (51092011).

Almost surely, 2^102184021 is an apocalyptic number.

It is an amenable number.

102184021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102184021 is an equidigital number, since it uses as much as digits as its factorization.

102184021 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 19.

The square root of 102184021 is about 10108.6112300355. The cubic root of 102184021 is about 467.5136865792.

The spelling of 102184021 in words is "one hundred two million, one hundred eighty-four thousand, twenty-one".