201234321240 has 64 divisors (see below), whose sum is σ = 603757186560. Its totient is φ = 53657665920.

The previous prime is 201234321229. The next prime is 201234321247. The reversal of 201234321240 is 42123432102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 201234321240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201234321247) 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 15 ways as a sum of consecutive naturals, for example, 1383585 + ... + 1522095.

It is an arithmetic number, because the mean of its divisors is an integer number (9433706040).

Almost surely, 2^201234321240 is an apocalyptic number.

201234321240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201234321240 is an abundant number, since it is smaller than the sum of its proper divisors (402522865320).

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

201234321240 is a wasteful number, since it uses less digits than its factorization.

201234321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150632 (or 150628 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 201234321240 its reverse (42123432102), we get a palindrome (243357753342).

The spelling of 201234321240 in words is "two hundred one billion, two hundred thirty-four million, three hundred twenty-one thousand, two hundred forty".