1020111011 has 2 divisors, whose sum is σ = 1020111012. Its totient is φ = 1020111010.

The previous prime is 1020110951. The next prime is 1020111013. The reversal of 1020111011 is 1101110201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020111011 is a prime.

Together with 1020111013, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020111011.

It is not a weakly prime, because it can be changed into another prime (1020111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510055505 + 510055506.

It is an arithmetic number, because the mean of its divisors is an integer number (510055506).

Almost surely, 2^1020111011 is an apocalyptic number.

1020111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020111011 is an equidigital number, since it uses as much as digits as its factorization.

1020111011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1020111011 is about 31939.1767426776. The cubic root of 1020111011 is about 1006.6592265993.

Adding to 1020111011 its reverse (1101110201), we get a palindrome (2121221212).

It can be divided in two parts, 10201 and 11011, that multiplied together give a palindrome (112323211).

The spelling of 1020111011 in words is "one billion, twenty million, one hundred eleven thousand, eleven".