123201042540 has 48 divisors (see below), whose sum is σ = 345103164672. Its totient is φ = 32840254656.

The previous prime is 123201042529. The next prime is 123201042593. The reversal of 123201042540 is 45240102321.

It is a self number, because there is not a number n which added to its sum of digits gives 123201042540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268144 + ... + 564183.

It is an arithmetic number, because the mean of its divisors is an integer number (7189649264).

Almost surely, 2^123201042540 is an apocalyptic number.

123201042540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123201042540 is an abundant number, since it is smaller than the sum of its proper divisors (221902122132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123201042540 is a wasteful number, since it uses less digits than its factorization.

123201042540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834806 (or 834804 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 123201042540 its reverse (45240102321), we get a palindrome (168441144861).

The spelling of 123201042540 in words is "one hundred twenty-three billion, two hundred one million, forty-two thousand, five hundred forty".