2021020010111 has 2 divisors, whose sum is σ = 2021020010112. Its totient is φ = 2021020010110.

The previous prime is 2021020010077. The next prime is 2021020010143. The reversal of 2021020010111 is 1110100201202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021020010111 - 2¹⁰ = 2021020009087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021020010092 and 2021020010101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021020010411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510005055 + 1010510005056.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510005056).

Almost surely, 2^{2021020010111} is an apocalyptic number.

2021020010111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021020010111 is an equidigital number, since it uses as much as digits as its factorization.

2021020010111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021020010111 its reverse (1110100201202), we get a palindrome (3131120211313).

The spelling of 2021020010111 in words is "two trillion, twenty-one billion, twenty million, ten thousand, one hundred eleven".