123223111111 has 4 divisors (see below), whose sum is σ = 123227027424. Its totient is φ = 123219194800.

The previous prime is 123223111069. The next prime is 123223111153. The reversal of 123223111111 is 111111322321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111111322321 = 16823 ⋅6604727.

It is an interprime number because it is at equal distance from previous prime (123223111069) and next prime (123223111153).

It is a cyclic number.

It is not a de Polignac number, because 123223111111 - 2³⁵ = 88863372743 is a prime.

It is a super-2 number, since 2×123223111111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123283111111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910575 + ... + 1974016.

It is an arithmetic number, because the mean of its divisors is an integer number (30806756856).

Almost surely, 2^123223111111 is an apocalyptic number.

123223111111 is a deficient number, since it is larger than the sum of its proper divisors (3916313).

123223111111 is an equidigital number, since it uses as much as digits as its factorization.

123223111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916312.

The product of its digits is 72, while the sum is 19.

Adding to 123223111111 its reverse (111111322321), we get a palindrome (234334433432).

The spelling of 123223111111 in words is "one hundred twenty-three billion, two hundred twenty-three million, one hundred eleven thousand, one hundred eleven".