1222530100 has 72 divisors (see below), whose sum is σ = 2913876000. Its totient is φ = 441513600.

The previous prime is 1222530059. The next prime is 1222530161. The reversal of 1222530100 is 10352221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160171 + ... + 167629.

It is an arithmetic number, because the mean of its divisors is an integer number (40470500).

Almost surely, 2^1222530100 is an apocalyptic number.

1222530100 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 1222530100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456938000).

1222530100 is an abundant number, since it is smaller than the sum of its proper divisors (1691345900).

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

1222530100 is a wasteful number, since it uses less digits than its factorization.

1222530100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7626 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1222530100 is about 34964.6979108929. The cubic root of 1222530100 is about 1069.2678777835.

Adding to 1222530100 its reverse (10352221), we get a palindrome (1232882321).

The spelling of 1222530100 in words is "one billion, two hundred twenty-two million, five hundred thirty thousand, one hundred".