1222123200 has 252 divisors, whose sum is σ = 4264148952. Its totient is φ = 306380800.

The previous prime is 1222123157. The next prime is 1222123207. The reversal of 1222123200 is 23212221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1222123200.

It is not an unprimeable number, because it can be changed into a prime (1222123207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1386760 + ... + 1387640.

It is an arithmetic number, because the mean of its divisors is an integer number (16921226).

Almost surely, 2^1222123200 is an apocalyptic number.

1222123200 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 1222123200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2132074476).

1222123200 is an abundant number, since it is smaller than the sum of its proper divisors (3042025752).

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

1222123200 is a wasteful number, since it uses less digits than its factorization.

1222123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1222123200 is about 34958.8787005533. The cubic root of 1222123200 is about 1069.1492349300.

Adding to 1222123200 its reverse (23212221), we get a palindrome (1245335421).

The spelling of 1222123200 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, two hundred".