2110020020021 has 2 divisors, whose sum is σ = 2110020020022. Its totient is φ = 2110020020020.

The previous prime is 2110020019993. The next prime is 2110020020071. The reversal of 2110020020021 is 1200200200112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082667491025 + 27352528996 = 1443145^2 + 165386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110020020021 - 2²² = 2110015825717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2110020019984 and 2110020020011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110020020071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055010010010 + 1055010010011.

It is an arithmetic number, because the mean of its divisors is an integer number (1055010010011).

Almost surely, 2^{2110020020021} is an apocalyptic number.

It is an amenable number.

2110020020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110020020021 is an equidigital number, since it uses as much as digits as its factorization.

2110020020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2110020020021 its reverse (1200200200112), we get a palindrome (3310220220133).

The spelling of 2110020020021 in words is "two trillion, one hundred ten billion, twenty million, twenty thousand, twenty-one".