123540202103 has 2 divisors, whose sum is σ = 123540202104. Its totient is φ = 123540202102.

The previous prime is 123540202091. The next prime is 123540202139. The reversal of 123540202103 is 301202045321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123540202103 - 2⁸ = 123540201847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123540202153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61770101051 + 61770101052.

It is an arithmetic number, because the mean of its divisors is an integer number (61770101052).

Almost surely, 2^123540202103 is an apocalyptic number.

123540202103 is a deficient number, since it is larger than the sum of its proper divisors (1).

123540202103 is an equidigital number, since it uses as much as digits as its factorization.

123540202103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 123540202103 its reverse (301202045321), we get a palindrome (424742247424).

The spelling of 123540202103 in words is "one hundred twenty-three billion, five hundred forty million, two hundred two thousand, one hundred three".