100110221021 has 2 divisors, whose sum is σ = 100110221022. Its totient is φ = 100110221020.

The previous prime is 100110221011. The next prime is 100110221063. The reversal of 100110221021 is 120122011001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79721522500 + 20388698521 = 282350^2 + 142789^2 .

It is an emirp because it is prime and its reverse (120122011001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100110221021 - 2⁶ = 100110220957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100110220993 and 100110221011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100110221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055110510 + 50055110511.

It is an arithmetic number, because the mean of its divisors is an integer number (50055110511).

Almost surely, 2^100110221021 is an apocalyptic number.

It is an amenable number.

100110221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100110221021 is an equidigital number, since it uses as much as digits as its factorization.

100110221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100110221021 its reverse (120122011001), we get a palindrome (220232232022).

The spelling of 100110221021 in words is "one hundred billion, one hundred ten million, two hundred twenty-one thousand, twenty-one".