1223220204 has 36 divisors (see below), whose sum is σ = 3206550984. Its totient is φ = 407739744.

The previous prime is 1223220197. The next prime is 1223220233. The reversal of 1223220204 is 4020223221.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1223220204³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 628257 + ... + 630200.

Almost surely, 2^1223220204 is an apocalyptic number.

It is an amenable number.

1223220204 is an abundant number, since it is smaller than the sum of its proper divisors (1983330780).

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

1223220204 is a wasteful number, since it uses less digits than its factorization.

1223220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258476 (or 1258462 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1223220204 is about 34974.5651009416. The cubic root of 1223220204 is about 1069.4690363580.

Adding to 1223220204 its reverse (4020223221), we get a palindrome (5243443425).

The spelling of 1223220204 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, two hundred four".