123112223111 has 8 divisors (see below), whose sum is σ = 123234227424. Its totient is φ = 122990274720.

The previous prime is 123112223107. The next prime is 123112223123. The reversal of 123112223111 is 111322211321.

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

It is a cyclic number.

It is not a de Polignac number, because 123112223111 - 2² = 123112223107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123112223161) 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 7 ways as a sum of consecutive naturals, for example, 5373821 + ... + 5396681.

It is an arithmetic number, because the mean of its divisors is an integer number (15404278428).

Almost surely, 2^123112223111 is an apocalyptic number.

123112223111 is a deficient number, since it is larger than the sum of its proper divisors (122004313).

123112223111 is a wasteful number, since it uses less digits than its factorization.

123112223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27961.

The product of its digits is 144, while the sum is 20.

Adding to 123112223111 its reverse (111322211321), we get a palindrome (234434434432).

The spelling of 123112223111 in words is "one hundred twenty-three billion, one hundred twelve million, two hundred twenty-three thousand, one hundred eleven".