123311011 has 2 divisors, whose sum is σ = 123311012. Its totient is φ = 123311010.

The previous prime is 123310991. The next prime is 123311051. The reversal of 123311011 is 110113321.

It is a weak prime.

It is an emirp because it is prime and its reverse (110113321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123311011 - 2¹¹ = 123308963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123310982 and 123311000.

It is not a weakly prime, because it can be changed into another prime (123311051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655505 + 61655506.

It is an arithmetic number, because the mean of its divisors is an integer number (61655506).

Almost surely, 2^123311011 is an apocalyptic number.

123311011 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311011 is an equidigital number, since it uses as much as digits as its factorization.

123311011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 123311011 is about 11104.5491128636. The cubic root of 123311011 is about 497.7377949594.

Adding to 123311011 its reverse (110113321), we get a palindrome (233424332).

The spelling of 123311011 in words is "one hundred twenty-three million, three hundred eleven thousand, eleven".