1020220111 has 2 divisors, whose sum is σ = 1020220112. Its totient is φ = 1020220110.

The previous prime is 1020220109. The next prime is 1020220127. The reversal of 1020220111 is 1110220201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020220111 - 2¹ = 1020220109 is a prime.

Together with 1020220109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020220151) 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, 510110055 + 510110056.

It is an arithmetic number, because the mean of its divisors is an integer number (510110056).

Almost surely, 2^1020220111 is an apocalyptic number.

1020220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020220111 is an equidigital number, since it uses as much as digits as its factorization.

1020220111 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 10.

The square root of 1020220111 is about 31940.8846308301. The cubic root of 1020220111 is about 1006.6951124344.

Adding to 1020220111 its reverse (1110220201), we get a palindrome (2130440312).

The spelling of 1020220111 in words is "one billion, twenty million, two hundred twenty thousand, one hundred eleven".