123234423021 has 12 divisors (see below), whose sum is σ = 178016441148. Its totient is φ = 82151129664.

The previous prime is 123234423017. The next prime is 123234423061. The reversal of 123234423021 is 120324432321.

123234423021 is a `hidden beast` number, since 1 + 2 + 3 + 234 + 423 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34722222921 + 88512200100 = 186339^2 + 297510^2 .

It is not a de Polignac number, because 123234423021 - 2² = 123234423017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123234423061) 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 11 ways as a sum of consecutive naturals, for example, 274960 + ... + 567513.

It is an arithmetic number, because the mean of its divisors is an integer number (14834703429).

Almost surely, 2^123234423021 is an apocalyptic number.

It is an amenable number.

123234423021 is a deficient number, since it is larger than the sum of its proper divisors (54782018127).

123234423021 is a wasteful number, since it uses less digits than its factorization.

123234423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858732 (or 858729 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 123234423021 its reverse (120324432321), we get a palindrome (243558855342).

It can be divided in two parts, 12323 and 4423021, that added together give a palindrome (4435344).

The spelling of 123234423021 in words is "one hundred twenty-three billion, two hundred thirty-four million, four hundred twenty-three thousand, twenty-one".