2031133221 has 24 divisors (see below), whose sum is σ = 3165178016. Its totient is φ = 1247698080.

The previous prime is 2031133219. The next prime is 2031133249. The reversal of 2031133221 is 1223311302.

2031133221 is a `hidden beast` number, since 2 + 0 + 311 + 332 + 21 = 666.

It is not a de Polignac number, because 2031133221 - 2¹ = 2031133219 is a prime.

It is a super-3 number, since 3×2031133221³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2031133194 and 2031133203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031133211) 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, 51606 + ... + 82008.

Almost surely, 2^2031133221 is an apocalyptic number.

It is an amenable number.

2031133221 is a deficient number, since it is larger than the sum of its proper divisors (1134044795).

2031133221 is a wasteful number, since it uses less digits than its factorization.

2031133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30993 (or 30990 counting only the distinct ones).

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

The square root of 2031133221 is about 45068.0953779944. The cubic root of 2031133221 is about 1266.4249844143.

Adding to 2031133221 its reverse (1223311302), we get a palindrome (3254444523).

The spelling of 2031133221 in words is "two billion, thirty-one million, one hundred thirty-three thousand, two hundred twenty-one".