100243321 has 2 divisors, whose sum is σ = 100243322. Its totient is φ = 100243320.

The previous prime is 100243307. The next prime is 100243327. The reversal of 100243321 is 123342001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91948921 + 8294400 = 9589^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 100243321 - 2⁵ = 100243289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100243295 and 100243304.

It is not a weakly prime, because it can be changed into another prime (100243327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50121660 + 50121661.

It is an arithmetic number, because the mean of its divisors is an integer number (50121661).

Almost surely, 2^100243321 is an apocalyptic number.

It is an amenable number.

100243321 is a deficient number, since it is larger than the sum of its proper divisors (1).

100243321 is an equidigital number, since it uses as much as digits as its factorization.

100243321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 100243321 is about 10012.1586583514. The cubic root of 100243321 is about 464.5350437791.

Adding to 100243321 its reverse (123342001), we get a palindrome (223585322).

The spelling of 100243321 in words is "one hundred million, two hundred forty-three thousand, three hundred twenty-one".