1220123403 has 24 divisors (see below), whose sum is σ = 1794136656. Its totient is φ = 798811200.

The previous prime is 1220123381. The next prime is 1220123449. The reversal of 1220123403 is 3043210221.

It is not a de Polignac number, because 1220123403 - 2⁸ = 1220123147 is a prime.

It is a super-2 number, since 2×1220123403² = 2977402237096600818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220123453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449376 + ... + 452082.

It is an arithmetic number, because the mean of its divisors is an integer number (74755694).

Almost surely, 2^1220123403 is an apocalyptic number.

1220123403 is a deficient number, since it is larger than the sum of its proper divisors (574013253).

1220123403 is a wasteful number, since it uses less digits than its factorization.

1220123403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595 (or 3592 counting only the distinct ones).

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

The square root of 1220123403 is about 34930.2648572839. The cubic root of 1220123403 is about 1068.5657561950.

Adding to 1220123403 its reverse (3043210221), we get a palindrome (4263333624).

The spelling of 1220123403 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, four hundred three".