135123103223 has 2 divisors, whose sum is σ = 135123103224. Its totient is φ = 135123103222.

The previous prime is 135123103217. The next prime is 135123103243. The reversal of 135123103223 is 322301321531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135123103223 - 2¹² = 135123099127 is a prime.

It is a super-2 number, since 2×135123103223² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135123103192 and 135123103201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135123103243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67561551611 + 67561551612.

It is an arithmetic number, because the mean of its divisors is an integer number (67561551612).

Almost surely, 2^135123103223 is an apocalyptic number.

135123103223 is a deficient number, since it is larger than the sum of its proper divisors (1).

135123103223 is an equidigital number, since it uses as much as digits as its factorization.

135123103223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 135123103223 its reverse (322301321531), we get a palindrome (457424424754).

The spelling of 135123103223 in words is "one hundred thirty-five billion, one hundred twenty-three million, one hundred three thousand, two hundred twenty-three".