100021103 has 12 divisors (see below), whose sum is σ = 125301960. Its totient is φ = 79137072.

The previous prime is 100021093. The next prime is 100021121. The reversal of 100021103 is 301120001.

It is not a de Polignac number, because 100021103 - 2⁶ = 100021039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77873 + ... + 79146.

It is an arithmetic number, because the mean of its divisors is an integer number (10441830).

Almost surely, 2^100021103 is an apocalyptic number.

100021103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100021103 is a deficient number, since it is larger than the sum of its proper divisors (25280857).

100021103 is a wasteful number, since it uses less digits than its factorization.

100021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157046 (or 157039 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 100021103 is about 10001.0550943388. The cubic root of 100021103 is about 464.1915315479.

Adding to 100021103 its reverse (301120001), we get a palindrome (401141104).

The spelling of 100021103 in words is "one hundred million, twenty-one thousand, one hundred three".