102111101 has 4 divisors (see below), whose sum is σ = 103122204. Its totient is φ = 101100000.

The previous prime is 102111071. The next prime is 102111103. The reversal of 102111101 is 101111201.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86508601 + 15602500 = 9301^2 + 3950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102111101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111103) 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, 505400 + ... + 505601.

It is an arithmetic number, because the mean of its divisors is an integer number (25780551).

Almost surely, 2^102111101 is an apocalyptic number.

It is an amenable number.

102111101 is a deficient number, since it is larger than the sum of its proper divisors (1011103).

102111101 is a wasteful number, since it uses less digits than its factorization.

102111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011102.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 102111101 is about 10105.0037605139. The cubic root of 102111101 is about 467.4024519321.

Adding to 102111101 its reverse (101111201), we get a palindrome (203222302).

The spelling of 102111101 in words is "one hundred two million, one hundred eleven thousand, one hundred one".