1111120261 has 2 divisors, whose sum is σ = 1111120262. Its totient is φ = 1111120260.

The previous prime is 1111120237. The next prime is 1111120277. The reversal of 1111120261 is 1620211111.

It is an a-pointer prime, because the next prime (1111120277) can be obtained adding 1111120261 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110888900 + 231361 = 33330^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111120261 - 2⁵ = 1111120229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111130261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560130 + 555560131.

It is an arithmetic number, because the mean of its divisors is an integer number (555560131).

Almost surely, 2^1111120261 is an apocalyptic number.

It is an amenable number.

1111120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111120261 is an equidigital number, since it uses as much as digits as its factorization.

1111120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

The square root of 1111120261 is about 33333.4705813841. The cubic root of 1111120261 is about 1035.7470117267.

Adding to 1111120261 its reverse (1620211111), we get a palindrome (2731331372).

The spelling of 1111120261 in words is "one billion, one hundred eleven million, one hundred twenty thousand, two hundred sixty-one".