123223100 has 144 divisors (see below), whose sum is σ = 359310336. Its totient is φ = 35424000.

The previous prime is 123223099. The next prime is 123223103. The reversal of 123223100 is 1322321.

It is a happy number.

It is a super-2 number, since 2×123223100² = 30367864747220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123223103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99485 + ... + 100715.

Almost surely, 2^123223100 is an apocalyptic number.

123223100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179655168).

123223100 is an abundant number, since it is smaller than the sum of its proper divisors (236087236).

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

123223100 is a wasteful number, since it uses less digits than its factorization.

123223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123223100 is about 11100.5900744060. The cubic root of 123223100 is about 497.6194842765.

Adding to 123223100 its reverse (1322321), we get a palindrome (124545421).

The spelling of 123223100 in words is "one hundred twenty-three million, two hundred twenty-three thousand, one hundred".