201333231121 has 6 divisors (see below), whose sum is σ = 221300163266. Its totient is φ = 183030210000.

The previous prime is 201333231079. The next prime is 201333231139. The reversal of 201333231121 is 121132333102.

It can be written as a sum of positive squares in only one way, i.e., 106740077521 + 94593153600 = 326711^2 + 307560^2 .

It is not a de Polignac number, because 201333231121 - 2²⁵ = 201299676689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201333231092 and 201333231101.

It is not an unprimeable number, because it can be changed into a prime (201333234121) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 831955380 + ... + 831955621.

Almost surely, 2^201333231121 is an apocalyptic number.

It is an amenable number.

201333231121 is a deficient number, since it is larger than the sum of its proper divisors (19966932145).

201333231121 is a wasteful number, since it uses less digits than its factorization.

201333231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663911023 (or 1663911012 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 201333231121 its reverse (121132333102), we get a palindrome (322465564223).

The spelling of 201333231121 in words is "two hundred one billion, three hundred thirty-three million, two hundred thirty-one thousand, one hundred twenty-one".