123221220200 has 96 divisors (see below), whose sum is σ = 309078655200. Its totient is φ = 45415714560.

The previous prime is 123221220179. The next prime is 123221220209. The reversal of 123221220200 is 2022122321.

It is not an unprimeable number, because it can be changed into a prime (123221220209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1421711 + ... + 1505889.

It is an arithmetic number, because the mean of its divisors is an integer number (3219569325).

Almost surely, 2^123221220200 is an apocalyptic number.

123221220200 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 123221220200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154539327600).

123221220200 is an abundant number, since it is smaller than the sum of its proper divisors (185857435000).

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

123221220200 is a wasteful number, since it uses less digits than its factorization.

123221220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84771 (or 84762 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 123221220200 its reverse (2022122321), we get a palindrome (125243342521).

The spelling of 123221220200 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred twenty thousand, two hundred".