102021103 has 4 divisors (see below), whose sum is σ = 102466840. Its totient is φ = 101575368.

The previous prime is 102021091. The next prime is 102021109. The reversal of 102021103 is 301120201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301120201 = 17 ⋅17712953.

It is a cyclic number.

It is not a de Polignac number, because 102021103 - 2²¹ = 99923951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222525 + ... + 222982.

It is an arithmetic number, because the mean of its divisors is an integer number (25616710).

Almost surely, 2^102021103 is an apocalyptic number.

102021103 is a deficient number, since it is larger than the sum of its proper divisors (445737).

102021103 is an equidigital number, since it uses as much as digits as its factorization.

102021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445736.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 102021103 is about 10100.5496385098. The cubic root of 102021103 is about 467.2650928859.

Adding to 102021103 its reverse (301120201), we get a palindrome (403141304).

The spelling of 102021103 in words is "one hundred two million, twenty-one thousand, one hundred three".