102021329 has 2 divisors, whose sum is σ = 102021330. Its totient is φ = 102021328.

The previous prime is 102021299. The next prime is 102021389. The reversal of 102021329 is 923120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91164304 + 10857025 = 9548^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021329 - 2¹² = 102017233 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 102021329.

It is not a weakly prime, because it can be changed into another prime (102021389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010664 + 51010665.

It is an arithmetic number, because the mean of its divisors is an integer number (51010665).

Almost surely, 2^102021329 is an apocalyptic number.

It is an amenable number.

102021329 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021329 is an equidigital number, since it uses as much as digits as its factorization.

102021329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 102021329 is about 10100.5608260136. The cubic root of 102021329 is about 467.2654379185.

The spelling of 102021329 in words is "one hundred two million, twenty-one thousand, three hundred twenty-nine".