1101020111 has 2 divisors, whose sum is σ = 1101020112. Its totient is φ = 1101020110.

The previous prime is 1101020071. The next prime is 1101020159. The reversal of 1101020111 is 1110201011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101020111 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101020161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550510055 + 550510056.

It is an arithmetic number, because the mean of its divisors is an integer number (550510056).

Almost surely, 2^1101020111 is an apocalyptic number.

1101020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101020111 is an equidigital number, since it uses as much as digits as its factorization.

1101020111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1101020111 is about 33181.6230917054. The cubic root of 1101020111 is about 1032.5991199860.

Adding to 1101020111 its reverse (1110201011), we get a palindrome (2211221122).

Subtracting 1101020111 from its reverse (1110201011), we obtain a square (9180900 = 3030²).

The spelling of 1101020111 in words is "one billion, one hundred one million, twenty thousand, one hundred eleven".