100821233 has 2 divisors, whose sum is σ = 100821234. Its totient is φ = 100821232.

The previous prime is 100821229. The next prime is 100821289. The reversal of 100821233 is 332128001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94926049 + 5895184 = 9743^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 100821233 - 2² = 100821229 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100821223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50410616 + 50410617.

It is an arithmetic number, because the mean of its divisors is an integer number (50410617).

Almost surely, 2^100821233 is an apocalyptic number.

It is an amenable number.

100821233 is a deficient number, since it is larger than the sum of its proper divisors (1).

100821233 is an equidigital number, since it uses as much as digits as its factorization.

100821233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 100821233 is about 10040.9776914402. The cubic root of 100821233 is about 465.4260295657.

Adding to 100821233 its reverse (332128001), we get a palindrome (432949234).

The spelling of 100821233 in words is "one hundred million, eight hundred twenty-one thousand, two hundred thirty-three".