123542500011 has 24 divisors (see below), whose sum is σ = 199980487680. Its totient is φ = 66443021952.

The previous prime is 123542499991. The next prime is 123542500027. The reversal of 123542500011 is 110005245321.

It is a happy number.

It is not a de Polignac number, because 123542500011 - 2¹³ = 123542491819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123542500031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10172091 + ... + 10184228.

It is an arithmetic number, because the mean of its divisors is an integer number (8332520320).

Almost surely, 2^123542500011 is an apocalyptic number.

123542500011 is a deficient number, since it is larger than the sum of its proper divisors (76437987669).

123542500011 is a wasteful number, since it uses less digits than its factorization.

123542500011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20356363 (or 20356346 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 123542500011 its reverse (110005245321), we get a palindrome (233547745332).

The spelling of 123542500011 in words is "one hundred twenty-three billion, five hundred forty-two million, five hundred thousand, eleven".