102221087 has 2 divisors, whose sum is σ = 102221088. Its totient is φ = 102221086.

The previous prime is 102221071. The next prime is 102221089. The reversal of 102221087 is 780122201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102221087 - 2⁴ = 102221071 is a prime.

Together with 102221089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102221089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110543 + 51110544.

It is an arithmetic number, because the mean of its divisors is an integer number (51110544).

Almost surely, 2^102221087 is an apocalyptic number.

102221087 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221087 is an equidigital number, since it uses as much as digits as its factorization.

102221087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 102221087 is about 10110.4444511604. Note that the first 4 decimals coincide. The cubic root of 102221087 is about 467.5702080303.

Adding to 102221087 its reverse (780122201), we get a palindrome (882343288).

The spelling of 102221087 in words is "one hundred two million, two hundred twenty-one thousand, eighty-seven".