102213191 has 2 divisors, whose sum is σ = 102213192. Its totient is φ = 102213190.

The previous prime is 102213187. The next prime is 102213227. The reversal of 102213191 is 191312201.

It is a weak prime.

It is an emirp because it is prime and its reverse (191312201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102213191 - 2² = 102213187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102213101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106595 + 51106596.

It is an arithmetic number, because the mean of its divisors is an integer number (51106596).

Almost surely, 2^102213191 is an apocalyptic number.

102213191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102213191 is an equidigital number, since it uses as much as digits as its factorization.

102213191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 102213191 is about 10110.0539563348. The cubic root of 102213191 is about 467.5581686703.

Adding to 102213191 its reverse (191312201), we get a palindrome (293525392).

The spelling of 102213191 in words is "one hundred two million, two hundred thirteen thousand, one hundred ninety-one".