122217400 has 72 divisors (see below), whose sum is σ = 298340280. Its totient is φ = 46474560.

The previous prime is 122217391. The next prime is 122217413. The reversal of 122217400 is 4712221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 749719 + ... + 749881.

It is an arithmetic number, because the mean of its divisors is an integer number (4143615).

Almost surely, 2^122217400 is an apocalyptic number.

122217400 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 122217400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149170140).

122217400 is an abundant number, since it is smaller than the sum of its proper divisors (176122880).

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

122217400 is a wasteful number, since it uses less digits than its factorization.

122217400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 122217400 is about 11055.1978724942. The cubic root of 122217400 is about 496.2619908825.

Adding to 122217400 its reverse (4712221), we get a palindrome (126929621).

The spelling of 122217400 in words is "one hundred twenty-two million, two hundred seventeen thousand, four hundred".