123243021043 has 2 divisors, whose sum is σ = 123243021044. Its totient is φ = 123243021042.

The previous prime is 123243020993. The next prime is 123243021047. The reversal of 123243021043 is 340120342321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123243021043 - 2²¹ = 123240923891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123243020999 and 123243021017.

It is not a weakly prime, because it can be changed into another prime (123243021047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621510521 + 61621510522.

It is an arithmetic number, because the mean of its divisors is an integer number (61621510522).

Almost surely, 2^123243021043 is an apocalyptic number.

123243021043 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243021043 is an equidigital number, since it uses as much as digits as its factorization.

123243021043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 123243021043 its reverse (340120342321), we get a palindrome (463363363364).

The spelling of 123243021043 in words is "one hundred twenty-three billion, two hundred forty-three million, twenty-one thousand, forty-three".