123011330111 has 4 divisors (see below), whose sum is σ = 123327555000. Its totient is φ = 122695105224.

The previous prime is 123011330059. The next prime is 123011330179. The reversal of 123011330111 is 111033110321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123011330111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123011330111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011336111) 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 in 3 ways as a sum of consecutive naturals, for example, 158111861 + ... + 158112638.

It is an arithmetic number, because the mean of its divisors is an integer number (30831888750).

Almost surely, 2^123011330111 is an apocalyptic number.

123011330111 is a deficient number, since it is larger than the sum of its proper divisors (316224889).

123011330111 is an equidigital number, since it uses as much as digits as its factorization.

123011330111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316224888.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 123011330111 its reverse (111033110321), we get a palindrome (234044440432).

The spelling of 123011330111 in words is "one hundred twenty-three billion, eleven million, three hundred thirty thousand, one hundred eleven".