123211111104 has 84 divisors (see below), whose sum is σ = 353808943384. Its totient is φ = 40995182592.

The previous prime is 123211111097. The next prime is 123211111109. The reversal of 123211111104 is 401111112321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123211111109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119544 + ... + 510600.

Almost surely, 2^123211111104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123211111104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176904471692).

123211111104 is an abundant number, since it is smaller than the sum of its proper divisors (230597832280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123211111104 is a wasteful number, since it uses less digits than its factorization.

123211111104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391622 (or 391609 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 123211111104 its reverse (401111112321), we get a palindrome (524322223425).

The spelling of 123211111104 in words is "one hundred twenty-three billion, two hundred eleven million, one hundred eleven thousand, one hundred four".