201101121 has 24 divisors (see below), whose sum is σ = 326429376. Its totient is φ = 118372320.

The previous prime is 201101093. The next prime is 201101137. The reversal of 201101121 is 121101102.

It is a happy number.

It is not a de Polignac number, because 201101121 - 2⁹ = 201100609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (201101141) 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, 34675 + ... + 40056.

It is an arithmetic number, because the mean of its divisors is an integer number (13601224).

Almost surely, 2^201101121 is an apocalyptic number.

It is an amenable number.

201101121 is a deficient number, since it is larger than the sum of its proper divisors (125328255).

201101121 is a wasteful number, since it uses less digits than its factorization.

201101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74773 (or 74770 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 201101121 is about 14181.0126930343. The cubic root of 201101121 is about 585.8748164922.

Adding to 201101121 its reverse (121101102), we get a palindrome (322202223).

The spelling of 201101121 in words is "two hundred one million, one hundred one thousand, one hundred twenty-one".