123222221100 has 216 divisors, whose sum is σ = 432734313648. Its totient is φ = 29064614400.

The previous prime is 123222221069. The next prime is 123222221113. The reversal of 123222221100 is 1122222321.

123222221100 is a `hidden beast` number, since 1 + 232 + 222 + 211 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 198102 + ... + 534498.

Almost surely, 2^123222221100 is an apocalyptic number.

123222221100 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 123222221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216367156824).

123222221100 is an abundant number, since it is smaller than the sum of its proper divisors (309512092548).

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

123222221100 is a wasteful number, since it uses less digits than its factorization.

123222221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336465 (or 336455 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 123222221100 its reverse (1122222321), we get a palindrome (124344443421).

It can be divided in two parts, 123222221 and 100, that added together give a palindrome (123222321).

The spelling of 123222221100 in words is "one hundred twenty-three billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred".