123111444481 has 2 divisors, whose sum is σ = 123111444482. Its totient is φ = 123111444480.

The previous prime is 123111444413. The next prime is 123111444499. The reversal of 123111444481 is 184444111321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109964528881 + 13146915600 = 331609^2 + 114660^2 .

It is an emirp because it is prime and its reverse (184444111321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123111444481 - 2⁹ = 123111443969 is a prime.

It is a super-2 number, since 2×123111444481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123111454481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555722240 + 61555722241.

It is an arithmetic number, because the mean of its divisors is an integer number (61555722241).

Almost surely, 2^123111444481 is an apocalyptic number.

It is an amenable number.

123111444481 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111444481 is an equidigital number, since it uses as much as digits as its factorization.

123111444481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 34.

The spelling of 123111444481 in words is "one hundred twenty-three billion, one hundred eleven million, four hundred forty-four thousand, four hundred eighty-one".