103443021 has 24 divisors (see below), whose sum is σ = 168452480. Its totient is φ = 62690760.

The previous prime is 103443019. The next prime is 103443023. The reversal of 103443021 is 120344301.

It is an interprime number because it is at equal distance from previous prime (103443019) and next prime (103443023).

It is not a de Polignac number, because 103443021 - 2¹ = 103443019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103442985 and 103443003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103443023) 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 23 ways as a sum of consecutive naturals, for example, 12565 + ... + 19098.

Almost surely, 2^103443021 is an apocalyptic number.

103443021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103443021 is a deficient number, since it is larger than the sum of its proper divisors (65009459).

103443021 is a wasteful number, since it uses less digits than its factorization.

103443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31694 (or 31677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 103443021 is about 10170.6942240931. The cubic root of 103443021 is about 469.4259189631.

Adding to 103443021 its reverse (120344301), we get a palindrome (223787322).

The spelling of 103443021 in words is "one hundred three million, four hundred forty-three thousand, twenty-one".