123500255101 has 4 divisors (see below), whose sum is σ = 123538743900. Its totient is φ = 123461766304.

The previous prime is 123500255093. The next prime is 123500255119. The reversal of 123500255101 is 101552005321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101552005321 = 13 ⋅7811692717.

It can be written as a sum of positive squares in 2 ways, for example, as 24589376100 + 98910879001 = 156810^2 + 314501^2 .

It is a cyclic number.

It is not a de Polignac number, because 123500255101 - 2³ = 123500255093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123500255161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19239586 + ... + 19246003.

It is an arithmetic number, because the mean of its divisors is an integer number (30884685975).

Almost surely, 2^123500255101 is an apocalyptic number.

It is an amenable number.

123500255101 is a deficient number, since it is larger than the sum of its proper divisors (38488799).

123500255101 is an equidigital number, since it uses as much as digits as its factorization.

123500255101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38488798.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 123500255101 in words is "one hundred twenty-three billion, five hundred million, two hundred fifty-five thousand, one hundred one".