100119821 has 2 divisors, whose sum is σ = 100119822. Its totient is φ = 100119820.

The previous prime is 100119787. The next prime is 100119839. The reversal of 100119821 is 128911001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69538921 + 30580900 = 8339^2 + 5530^2 .

It is an emirp because it is prime and its reverse (128911001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100119821 - 2⁶ = 100119757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100119871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50059910 + 50059911.

It is an arithmetic number, because the mean of its divisors is an integer number (50059911).

Almost surely, 2^100119821 is an apocalyptic number.

It is an amenable number.

100119821 is a deficient number, since it is larger than the sum of its proper divisors (1).

100119821 is an equidigital number, since it uses as much as digits as its factorization.

100119821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 100119821 is about 10005.9892564404. The cubic root of 100119821 is about 464.3441959717.

The spelling of 100119821 in words is "one hundred million, one hundred nineteen thousand, eight hundred twenty-one".