201202123440 has 160 divisors (see below), whose sum is σ = 635867801856. Its totient is φ = 52610688000.

The previous prime is 201202123429. The next prime is 201202123477. The reversal of 201202123440 is 44321202102.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 28629207 + ... + 28636233.

Almost surely, 2^201202123440 is an apocalyptic number.

201202123440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201202123440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317933900928).

201202123440 is an abundant number, since it is smaller than the sum of its proper divisors (434665678416).

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

201202123440 is a wasteful number, since it uses less digits than its factorization.

201202123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9347 (or 9341 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 201202123440 its reverse (44321202102), we get a palindrome (245523325542).

The spelling of 201202123440 in words is "two hundred one billion, two hundred two million, one hundred twenty-three thousand, four hundred forty".