123541421200 has 60 divisors (see below), whose sum is σ = 301674033268. Its totient is φ = 48606451200.

The previous prime is 123541421149. The next prime is 123541421209. The reversal of 123541421200 is 2124145321.

It can be written as a sum of positive squares in 6 ways, for example, as 8071944336 + 115469476864 = 89844^2 + 339808^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (123541421209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2507187 + ... + 2555986.

Almost surely, 2^123541421200 is an apocalyptic number.

123541421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123541421200 is an abundant number, since it is smaller than the sum of its proper divisors (178132612068).

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

123541421200 is a wasteful number, since it uses less digits than its factorization.

123541421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063252 (or 5063241 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 123541421200 its reverse (2124145321), we get a palindrome (125665566521).

The spelling of 123541421200 in words is "one hundred twenty-three billion, five hundred forty-one million, four hundred twenty-one thousand, two hundred".