123038856881 has 2 divisors, whose sum is σ = 123038856882. Its totient is φ = 123038856880.

The previous prime is 123038856859. The next prime is 123038856949. The reversal of 123038856881 is 188658830321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68196711025 + 54842145856 = 261145^2 + 234184^2 .

It is a cyclic number.

It is not a de Polignac number, because 123038856881 - 2⁶ = 123038856817 is a prime.

It is a super-2 number, since 2×123038856881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123038856841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61519428440 + 61519428441.

It is an arithmetic number, because the mean of its divisors is an integer number (61519428441).

Almost surely, 2^123038856881 is an apocalyptic number.

It is an amenable number.

123038856881 is a deficient number, since it is larger than the sum of its proper divisors (1).

123038856881 is an equidigital number, since it uses as much as digits as its factorization.

123038856881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 123038856881 in words is "one hundred twenty-three billion, thirty-eight million, eight hundred fifty-six thousand, eight hundred eighty-one".