2000111021 has 2 divisors, whose sum is σ = 2000111022. Its totient is φ = 2000111020.

The previous prime is 2000111017. The next prime is 2000111051. The reversal of 2000111021 is 1201110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1627234921 + 372876100 = 40339^2 + 19310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000111021 - 2² = 2000111017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000111051) 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, 1000055510 + 1000055511.

It is an arithmetic number, because the mean of its divisors is an integer number (1000055511).

Almost surely, 2^2000111021 is an apocalyptic number.

It is an amenable number.

2000111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000111021 is an equidigital number, since it uses as much as digits as its factorization.

2000111021 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 2000111021 is about 44722.6007852853. The cubic root of 2000111021 is about 1259.9443624127.

Adding to 2000111021 its reverse (1201110002), we get a palindrome (3201221023).

The spelling of 2000111021 in words is "two billion, one hundred eleven thousand, twenty-one".