123444230021 has 16 divisors (see below), whose sum is σ = 144388468224. Its totient is φ = 103328298864.

The previous prime is 123444230011. The next prime is 123444230033. The reversal of 123444230021 is 120032444321.

It is not a de Polignac number, because 123444230021 - 2¹⁰ = 123444228997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123444230011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1600670 + ... + 1676016.

It is an arithmetic number, because the mean of its divisors is an integer number (9024279264).

Almost surely, 2^123444230021 is an apocalyptic number.

It is an amenable number.

123444230021 is a deficient number, since it is larger than the sum of its proper divisors (20944238203).

123444230021 is an equidigital number, since it uses as much as digits as its factorization.

123444230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80840.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 123444230021 its reverse (120032444321), we get a palindrome (243476674342).

The spelling of 123444230021 in words is "one hundred twenty-three billion, four hundred forty-four million, two hundred thirty thousand, twenty-one".