123111323211 has 8 divisors (see below), whose sum is σ = 164208154000. Its totient is φ = 82044353952.

The previous prime is 123111323207. The next prime is 123111323219. The reversal of 123111323211 is 112323111321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123111323211 - 2² = 123111323207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123111323219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7455760 + ... + 7472253.

It is an arithmetic number, because the mean of its divisors is an integer number (20526019250).

Almost surely, 2^123111323211 is an apocalyptic number.

123111323211 is a deficient number, since it is larger than the sum of its proper divisors (41096830789).

123111323211 is a wasteful number, since it uses less digits than its factorization.

123111323211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14930765.

The product of its digits is 216, while the sum is 21.

Adding to 123111323211 its reverse (112323111321), we get a palindrome (235434434532).

The spelling of 123111323211 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred twenty-three thousand, two hundred eleven".