102105011 has 4 divisors (see below), whose sum is σ = 102263472. Its totient is φ = 101946552.

The previous prime is 102105007. The next prime is 102105019. The reversal of 102105011 is 110501201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102105011 - 2² = 102105007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102104983 and 102105001.

It is not an unprimeable number, because it can be changed into a prime (102105019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78260 + ... + 79553.

It is an arithmetic number, because the mean of its divisors is an integer number (25565868).

Almost surely, 2^102105011 is an apocalyptic number.

102105011 is a deficient number, since it is larger than the sum of its proper divisors (158461).

102105011 is an equidigital number, since it uses as much as digits as its factorization.

102105011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158460.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 102105011 is about 10104.7024201606. The cubic root of 102105011 is about 467.3931596433.

Adding to 102105011 its reverse (110501201), we get a palindrome (212606212).

The spelling of 102105011 in words is "one hundred two million, one hundred five thousand, eleven".