123216363643 has 2 divisors, whose sum is σ = 123216363644. Its totient is φ = 123216363642.

The previous prime is 123216363631. The next prime is 123216363661. The reversal of 123216363643 is 346363612321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123216363643 - 2¹⁷ = 123216232571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123216363596 and 123216363605.

It is not a weakly prime, because it can be changed into another prime (123216363143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61608181821 + 61608181822.

It is an arithmetic number, because the mean of its divisors is an integer number (61608181822).

Almost surely, 2^123216363643 is an apocalyptic number.

123216363643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123216363643 is an equidigital number, since it uses as much as digits as its factorization.

123216363643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 40.

Adding to 123216363643 its reverse (346363612321), we get a palindrome (469579975964).

The spelling of 123216363643 in words is "one hundred twenty-three billion, two hundred sixteen million, three hundred sixty-three thousand, six hundred forty-three".