1221103304 has 64 divisors (see below), whose sum is σ = 2484397440. Its totient is φ = 561116160.

The previous prime is 1221103297. The next prime is 1221103309. The reversal of 1221103304 is 4033011221.

It is not an unprimeable number, because it can be changed into a prime (1221103309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563984 + ... + 566144.

It is an arithmetic number, because the mean of its divisors is an integer number (38818710).

Almost surely, 2^1221103304 is an apocalyptic number.

It is an amenable number.

1221103304 is an abundant number, since it is smaller than the sum of its proper divisors (1263294136).

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

1221103304 is a wasteful number, since it uses less digits than its factorization.

1221103304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2306 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221103304 is about 34944.2885748158. The cubic root of 1221103304 is about 1068.8517405099.

Adding to 1221103304 its reverse (4033011221), we get a palindrome (5254114525).

The spelling of 1221103304 in words is "one billion, two hundred twenty-one million, one hundred three thousand, three hundred four".