123234557801 has 2 divisors, whose sum is σ = 123234557802. Its totient is φ = 123234557800.

The previous prime is 123234557779. The next prime is 123234557857. The reversal of 123234557801 is 108755432321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94028089600 + 29206468201 = 306640^2 + 170899^2 .

It is an emirp because it is prime and its reverse (108755432321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123234557801 is a prime.

It is not a weakly prime, because it can be changed into another prime (123234557881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61617278900 + 61617278901.

It is an arithmetic number, because the mean of its divisors is an integer number (61617278901).

Almost surely, 2^123234557801 is an apocalyptic number.

It is an amenable number.

123234557801 is a deficient number, since it is larger than the sum of its proper divisors (1).

123234557801 is an equidigital number, since it uses as much as digits as its factorization.

123234557801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 123234557801 in words is "one hundred twenty-three billion, two hundred thirty-four million, five hundred fifty-seven thousand, eight hundred one".