123344342021 has 2 divisors, whose sum is σ = 123344342022. Its totient is φ = 123344342020.

The previous prime is 123344342003. The next prime is 123344342039. The reversal of 123344342021 is 120243443321.

It is a balanced prime because it is at equal distance from previous prime (123344342003) and next prime (123344342039).

It can be written as a sum of positive squares in only one way, i.e., 117851457025 + 5492884996 = 343295^2 + 74114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123344342021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123344302021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61672171010 + 61672171011.

It is an arithmetic number, because the mean of its divisors is an integer number (61672171011).

Almost surely, 2^123344342021 is an apocalyptic number.

It is an amenable number.

123344342021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123344342021 is an equidigital number, since it uses as much as digits as its factorization.

123344342021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 123344342021 its reverse (120243443321), we get a palindrome (243587785342).

The spelling of 123344342021 in words is "one hundred twenty-three billion, three hundred forty-four million, three hundred forty-two thousand, twenty-one".