102111219 has 16 divisors (see below), whose sum is σ = 172887040. Its totient is φ = 58349160.

The previous prime is 102111203. The next prime is 102111239. The reversal of 102111219 is 912111201.

It is a happy number.

It is not a de Polignac number, because 102111219 - 2⁴ = 102111203 is a prime.

It is a super-2 number, since 2×102111219² = 20853402091331922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102111239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269947 + ... + 270324.

It is an arithmetic number, because the mean of its divisors is an integer number (10805440).

Almost surely, 2^102111219 is an apocalyptic number.

102111219 is a deficient number, since it is larger than the sum of its proper divisors (70775821).

102111219 is an equidigital number, since it uses as much as digits as its factorization.

102111219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540287 (or 540281 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 102111219 is about 10105.0095992038. The cubic root of 102111219 is about 467.4026319761.

Subtracting from 102111219 its sum of digits (18), we obtain a palindrome (102111201).

The spelling of 102111219 in words is "one hundred two million, one hundred eleven thousand, two hundred nineteen".