1221030200 has 48 divisors (see below), whose sum is σ = 3057278280. Its totient is φ = 450840960.

The previous prime is 1221030199. The next prime is 1221030257. The reversal of 1221030200 is 20301221.

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 11 ways as a sum of consecutive naturals, for example, 232214 + ... + 237413.

Almost surely, 2^1221030200 is an apocalyptic number.

1221030200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221030200 is an abundant number, since it is smaller than the sum of its proper divisors (1836248080).

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

1221030200 is a wasteful number, since it uses less digits than its factorization.

1221030200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469656 (or 469647 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1221030200 is about 34943.2425513146. The cubic root of 1221030200 is about 1068.8304103744.

Adding to 1221030200 its reverse (20301221), we get a palindrome (1241331421).

The spelling of 1221030200 in words is "one billion, two hundred twenty-one million, thirty thousand, two hundred".