1220304123 has 20 divisors (see below), whose sum is σ = 1902183888. Its totient is φ = 778163760.

The previous prime is 1220304121. The next prime is 1220304167. The reversal of 1220304123 is 3214030221.

1220304123 is a `hidden beast` number, since 1 + 220 + 30 + 412 + 3 = 666.

It is not a de Polignac number, because 1220304123 - 2¹ = 1220304121 is a prime.

It is a super-2 number, since 2×1220304123² = 2978284305221598258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220304096 and 1220304105.

It is not an unprimeable number, because it can be changed into a prime (1220304121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 325648 + ... + 329373.

Almost surely, 2^1220304123 is an apocalyptic number.

1220304123 is a deficient number, since it is larger than the sum of its proper divisors (681879765).

1220304123 is an equidigital number, since it uses as much as digits as its factorization.

1220304123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655056 (or 655047 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1220304123 is about 34932.8516299486. The cubic root of 1220304123 is about 1068.6185108779.

Adding to 1220304123 its reverse (3214030221), we get a palindrome (4434334344).

The spelling of 1220304123 in words is "one billion, two hundred twenty million, three hundred four thousand, one hundred twenty-three".