2020121111 has 2 divisors, whose sum is σ = 2020121112. Its totient is φ = 2020121110.

The previous prime is 2020121069. The next prime is 2020121113. The reversal of 2020121111 is 1111210202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020121111 - 2¹⁰ = 2020120087 is a prime.

Together with 2020121113, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2020121092 and 2020121101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020121113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010060555 + 1010060556.

It is an arithmetic number, because the mean of its divisors is an integer number (1010060556).

Almost surely, 2^2020121111 is an apocalyptic number.

2020121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020121111 is an equidigital number, since it uses as much as digits as its factorization.

2020121111 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.

The square root of 2020121111 is about 44945.7574304850. The cubic root of 2020121111 is about 1264.1321279304.

Adding to 2020121111 its reverse (1111210202), we get a palindrome (3131331313).

The spelling of 2020121111 in words is "two billion, twenty million, one hundred twenty-one thousand, one hundred eleven".