102254221 has 2 divisors, whose sum is σ = 102254222. Its totient is φ = 102254220.

The previous prime is 102254189. The next prime is 102254231. The reversal of 102254221 is 122452201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100280196 + 1974025 = 10014^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 102254221 - 2⁵ = 102254189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102254231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51127110 + 51127111.

It is an arithmetic number, because the mean of its divisors is an integer number (51127111).

Almost surely, 2^102254221 is an apocalyptic number.

It is an amenable number.

102254221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102254221 is an equidigital number, since it uses as much as digits as its factorization.

102254221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102254221 is about 10112.0829209417. The cubic root of 102254221 is about 467.6207220620.

The spelling of 102254221 in words is "one hundred two million, two hundred fifty-four thousand, two hundred twenty-one".