102219911 has 2 divisors, whose sum is σ = 102219912. Its totient is φ = 102219910.

The previous prime is 102219899. The next prime is 102219959. The reversal of 102219911 is 119912201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102219911 - 2¹⁰ = 102218887 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 (102219961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51109955 + 51109956.

It is an arithmetic number, because the mean of its divisors is an integer number (51109956).

Almost surely, 2^102219911 is an apocalyptic number.

102219911 is a deficient number, since it is larger than the sum of its proper divisors (1).

102219911 is an equidigital number, since it uses as much as digits as its factorization.

102219911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 102219911 is about 10110.3862933124. The cubic root of 102219911 is about 467.5684149735.

The spelling of 102219911 in words is "one hundred two million, two hundred nineteen thousand, nine hundred eleven".