102189211 has 2 divisors, whose sum is σ = 102189212. Its totient is φ = 102189210.

The previous prime is 102189187. The next prime is 102189221. The reversal of 102189211 is 112981201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102189211 - 2⁷ = 102189083 is a prime.

It is not a weakly prime, because it can be changed into another prime (102189221) 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, 51094605 + 51094606.

It is an arithmetic number, because the mean of its divisors is an integer number (51094606).

Almost surely, 2^102189211 is an apocalyptic number.

102189211 is a deficient number, since it is larger than the sum of its proper divisors (1).

102189211 is an equidigital number, since it uses as much as digits as its factorization.

102189211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 102189211 is about 10108.8679385973. The cubic root of 102189211 is about 467.5216015641.

It can be divided in two parts, 102189 and 211, that added together give a square (102400 = 320²).

The spelling of 102189211 in words is "one hundred two million, one hundred eighty-nine thousand, two hundred eleven".