123043222531 has 2 divisors, whose sum is σ = 123043222532. Its totient is φ = 123043222530.

The previous prime is 123043222507. The next prime is 123043222543. The reversal of 123043222531 is 135222340321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123043222531 - 2²³ = 123034833923 is a prime.

It is a super-2 number, since 2×123043222531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123043222531.

It is not a weakly prime, because it can be changed into another prime (123043222331) 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 as a sum of consecutive naturals, namely, 61521611265 + 61521611266.

It is an arithmetic number, because the mean of its divisors is an integer number (61521611266).

Almost surely, 2^123043222531 is an apocalyptic number.

123043222531 is a deficient number, since it is larger than the sum of its proper divisors (1).

123043222531 is an equidigital number, since it uses as much as digits as its factorization.

123043222531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 123043222531 its reverse (135222340321), we get a palindrome (258265562852).

The spelling of 123043222531 in words is "one hundred twenty-three billion, forty-three million, two hundred twenty-two thousand, five hundred thirty-one".