123111454481 has 2 divisors, whose sum is σ = 123111454482. Its totient is φ = 123111454480.

The previous prime is 123111454469. The next prime is 123111454547. The reversal of 123111454481 is 184454111321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115855140625 + 7256313856 = 340375^2 + 85184^2 .

It is a cyclic number.

It is not a de Polignac number, because 123111454481 - 2¹⁴ = 123111438097 is a prime.

It is a super-2 number, since 2×123111454481² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123111454421) 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, 61555727240 + 61555727241.

It is an arithmetic number, because the mean of its divisors is an integer number (61555727241).

Almost surely, 2^123111454481 is an apocalyptic number.

It is an amenable number.

123111454481 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111454481 is an equidigital number, since it uses as much as digits as its factorization.

123111454481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 35.

The spelling of 123111454481 in words is "one hundred twenty-three billion, one hundred eleven million, four hundred fifty-four thousand, four hundred eighty-one".