201121601055117 has 32 divisors (see below), whose sum is σ = 280310014513152. Its totient is φ = 128027540344704.

The previous prime is 201121601055101. The next prime is 201121601055121. The reversal of 201121601055117 is 711550106121102.

It is not a de Polignac number, because 201121601055117 - 2⁴ = 201121601055101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121601015117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343995768 + ... + 344579934.

It is an arithmetic number, because the mean of its divisors is an integer number (8759687953536).

Almost surely, 2^{201121601055117} is an apocalyptic number.

It is an amenable number.

201121601055117 is a deficient number, since it is larger than the sum of its proper divisors (79188413458035).

201121601055117 is a wasteful number, since it uses less digits than its factorization.

201121601055117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592897.

The product of its (nonzero) digits is 4200, while the sum is 33.

Adding to 201121601055117 its reverse (711550106121102), we get a palindrome (912671707176219).

The spelling of 201121601055117 in words is "two hundred one trillion, one hundred twenty-one billion, six hundred one million, fifty-five thousand, one hundred seventeen".