201120550501 has 24 divisors (see below), whose sum is σ = 218656708200. Its totient is φ = 184904928000.

The previous prime is 201120550481. The next prime is 201120550537. The reversal of 201120550501 is 105055021102.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 115210009476 + 85910541025 = 339426^2 + 293105^2 .

It is not a de Polignac number, because 201120550501 - 2⁵ = 201120550469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201120550541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76732971 + ... + 76735591.

It is an arithmetic number, because the mean of its divisors is an integer number (9110696175).

Almost surely, 2^201120550501 is an apocalyptic number.

It is an amenable number.

201120550501 is a deficient number, since it is larger than the sum of its proper divisors (17536157699).

201120550501 is a wasteful number, since it uses less digits than its factorization.

201120550501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 201120550501 its reverse (105055021102), we get a palindrome (306175571603).

The spelling of 201120550501 in words is "two hundred one billion, one hundred twenty million, five hundred fifty thousand, five hundred one".