1242113123 has 8 divisors (see below), whose sum is σ = 1287938880. Its totient is φ = 1196487040.

The previous prime is 1242113113. The next prime is 1242113161. The reversal of 1242113123 is 3213112421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242113123 - 2²⁴ = 1225335907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242113095 and 1242113104.

It is not an unprimeable number, because it can be changed into a prime (1242113113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 37190 + ... + 62187.

It is an arithmetic number, because the mean of its divisors is an integer number (160992360).

Almost surely, 2^1242113123 is an apocalyptic number.

1242113123 is a deficient number, since it is larger than the sum of its proper divisors (45825757).

1242113123 is an equidigital number, since it uses as much as digits as its factorization.

1242113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99837.

The product of its digits is 288, while the sum is 20.

The square root of 1242113123 is about 35243.6252817442. The cubic root of 1242113123 is about 1074.9469951872.

Adding to 1242113123 its reverse (3213112421), we get a palindrome (4455225544).

The spelling of 1242113123 in words is "one billion, two hundred forty-two million, one hundred thirteen thousand, one hundred twenty-three".