123020456242 has 16 divisors (see below), whose sum is σ = 202122860760. Its totient is φ = 55895703808.

The previous prime is 123020456231. The next prime is 123020456243. The reversal of 123020456242 is 242654020321.

It can be written as a sum of positive squares in 4 ways, for example, as 98992666161 + 24027790081 = 314631^2 + 155009^2 .

It is not an unprimeable number, because it can be changed into a prime (123020456243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 62382613 + ... + 62384584.

Almost surely, 2^123020456242 is an apocalyptic number.

123020456242 is a deficient number, since it is larger than the sum of its proper divisors (79102404518).

123020456242 is a wasteful number, since it uses less digits than its factorization.

123020456242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124767245.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 123020456242 its reverse (242654020321), we get a palindrome (365674476563).

The spelling of 123020456242 in words is "one hundred twenty-three billion, twenty million, four hundred fifty-six thousand, two hundred forty-two".