2033131221 has 24 divisors (see below), whose sum is σ = 3248856000. Its totient is φ = 1214841600.

The previous prime is 2033131213. The next prime is 2033131237. The reversal of 2033131221 is 1221313302.

2033131221 is a `hidden beast` number, since 2 + 0 + 331 + 312 + 21 = 666.

It is not a de Polignac number, because 2033131221 - 2³ = 2033131213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2033131194 and 2033131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2033131021) 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 23 ways as a sum of consecutive naturals, for example, 137596 + ... + 151653.

It is an arithmetic number, because the mean of its divisors is an integer number (135369000).

Almost surely, 2^2033131221 is an apocalyptic number.

It is an amenable number.

2033131221 is a deficient number, since it is larger than the sum of its proper divisors (1215724779).

2033131221 is a wasteful number, since it uses less digits than its factorization.

2033131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289337 (or 289334 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2033131221 is about 45090.2563864966. The cubic root of 2033131221 is about 1266.8401037289.

Adding to 2033131221 its reverse (1221313302), we get a palindrome (3254444523).

The spelling of 2033131221 in words is "two billion, thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".