201001001236 has 24 divisors (see below), whose sum is σ = 425649180096. Its totient is φ = 81076033920.

The previous prime is 201001001183. The next prime is 201001001237. The reversal of 201001001236 is 632100100102.

201001001236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001001237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211135030 + ... + 211135981.

It is an arithmetic number, because the mean of its divisors is an integer number (17735382504).

Almost surely, 2^201001001236 is an apocalyptic number.

It is an amenable number.

201001001236 is an abundant number, since it is smaller than the sum of its proper divisors (224648178860).

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

201001001236 is a wasteful number, since it uses less digits than its factorization.

201001001236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422271039 (or 422271037 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201001001236 its reverse (632100100102), we get a palindrome (833101101338).

The spelling of 201001001236 in words is "two hundred one billion, one million, one thousand, two hundred thirty-six".