1221223504 has 20 divisors (see below), whose sum is σ = 2369999476. Its totient is φ = 609610752.

The previous prime is 1221223483. The next prime is 1221223511. The reversal of 1221223504 is 4053221221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 1219406400 = 1348^2 + 34920^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52449 + ... + 72064.

Almost surely, 2^1221223504 is an apocalyptic number.

It is an amenable number.

1221223504 is a deficient number, since it is larger than the sum of its proper divisors (1148775972).

1221223504 is a wasteful number, since it uses less digits than its factorization.

1221223504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125134 (or 125128 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1221223504 is about 34946.0084129790. The cubic root of 1221223504 is about 1068.8868103694.

Adding to 1221223504 its reverse (4053221221), we get a palindrome (5274444725).

The spelling of 1221223504 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, five hundred four".