102111019 has 4 divisors (see below), whose sum is σ = 104037696. Its totient is φ = 100184344.

The previous prime is 102110971. The next prime is 102111029. The reversal of 102111019 is 910111201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910111201 = 17 ⋅53535953.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102111019 is a prime.

It is a super-2 number, since 2×102111019² = 20853320402436722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102110993 and 102111011.

It is not an unprimeable number, because it can be changed into a prime (102111029) 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 in 3 ways as a sum of consecutive naturals, for example, 963259 + ... + 963364.

It is an arithmetic number, because the mean of its divisors is an integer number (26009424).

Almost surely, 2^102111019 is an apocalyptic number.

102111019 is a deficient number, since it is larger than the sum of its proper divisors (1926677).

102111019 is an equidigital number, since it uses as much as digits as its factorization.

102111019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926676.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 102111019 is about 10104.9997031173. Note that the first 3 decimals coincide. The cubic root of 102111019 is about 467.4023268167.

The spelling of 102111019 in words is "one hundred two million, one hundred eleven thousand, nineteen".