2110001021 has 2 divisors, whose sum is σ = 2110001022. Its totient is φ = 2110001020.

The previous prime is 2110000993. The next prime is 2110001039. The reversal of 2110001021 is 1201000112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2102222500 + 7778521 = 45850^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110001021 - 2³⁰ = 1036259197 is a prime.

It is a Sophie Germain 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 (2110001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055000510 + 1055000511.

It is an arithmetic number, because the mean of its divisors is an integer number (1055000511).

Almost surely, 2^2110001021 is an apocalyptic number.

It is an amenable number.

2110001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110001021 is an equidigital number, since it uses as much as digits as its factorization.

2110001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2110001021 is about 45934.7474250158. The cubic root of 2110001021 is about 1282.6088192633.

Adding to 2110001021 its reverse (1201000112), we get a palindrome (3311001133).

Subtracting from 2110001021 its reverse (1201000112), we obtain a palindrome (909000909).

The spelling of 2110001021 in words is "two billion, one hundred ten million, one thousand, twenty-one".