1221302200 has 24 divisors (see below), whose sum is σ = 2839528080. Its totient is φ = 488520800.

The previous prime is 1221302171. The next prime is 1221302213. The reversal of 1221302200 is 22031221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3053056 + ... + 3053455.

It is an arithmetic number, because the mean of its divisors is an integer number (118313670).

Almost surely, 2^1221302200 is an apocalyptic number.

1221302200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221302200 is an abundant number, since it is smaller than the sum of its proper divisors (1618225880).

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

1221302200 is a wasteful number, since it uses less digits than its factorization.

1221302200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106527 (or 6106518 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221302200 is about 34947.1343603449. The cubic root of 1221302200 is about 1068.9097696692.

Adding to 1221302200 its reverse (22031221), we get a palindrome (1243333421).

The spelling of 1221302200 in words is "one billion, two hundred twenty-one million, three hundred two thousand, two hundred".