1221302204 has 24 divisors (see below), whose sum is σ = 2152735200. Its totient is φ = 606251520.

The previous prime is 1221302171. The next prime is 1221302213. The reversal of 1221302204 is 4022031221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344312 + ... + 347840.

It is an arithmetic number, because the mean of its divisors is an integer number (89697300).

Almost surely, 2^1221302204 is an apocalyptic number.

It is an amenable number.

1221302204 is a deficient number, since it is larger than the sum of its proper divisors (931432996).

1221302204 is a wasteful number, since it uses less digits than its factorization.

1221302204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221302204 is about 34947.1344175742. The cubic root of 1221302204 is about 1068.9097708362.

Adding to 1221302204 its reverse (4022031221), we get a palindrome (5243333425).

The spelling of 1221302204 in words is "one billion, two hundred twenty-one million, three hundred two thousand, two hundred four".