103321100021 has 4 divisors (see below), whose sum is σ = 103372944012. Its totient is φ = 103269256032.

The previous prime is 103321099943. The next prime is 103321100023. The reversal of 103321100021 is 120001123301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120001123301 = 29 ⋅4137969769.

It can be written as a sum of positive squares in 2 ways, for example, as 92164459396 + 11156640625 = 303586^2 + 105625^2 .

It is a cyclic number.

It is not a de Polignac number, because 103321100021 - 2¹⁰ = 103321098997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103321099969 and 103321100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103321100023) 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, 25919006 + ... + 25922991.

It is an arithmetic number, because the mean of its divisors is an integer number (25843236003).

Almost surely, 2^103321100021 is an apocalyptic number.

It is an amenable number.

103321100021 is a deficient number, since it is larger than the sum of its proper divisors (51843991).

103321100021 is an equidigital number, since it uses as much as digits as its factorization.

103321100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51843990.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 103321100021 its reverse (120001123301), we get a palindrome (223322223322).

The spelling of 103321100021 in words is "one hundred three billion, three hundred twenty-one million, one hundred thousand, twenty-one".