2131133221 has 8 divisors (see below), whose sum is σ = 2437525440. Its totient is φ = 1825227168.

The previous prime is 2131133203. The next prime is 2131133261. The reversal of 2131133221 is 1223311312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131133221 - 2⁵ = 2131133189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131133261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112096 + ... + 129721.

It is an arithmetic number, because the mean of its divisors is an integer number (304690680).

Almost surely, 2^2131133221 is an apocalyptic number.

It is an amenable number.

2131133221 is a deficient number, since it is larger than the sum of its proper divisors (306392219).

2131133221 is a wasteful number, since it uses less digits than its factorization.

2131133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243083.

The product of its digits is 216, while the sum is 19.

The square root of 2131133221 is about 46164.1984767417. The cubic root of 2131133221 is about 1286.8764886935.

Adding to 2131133221 its reverse (1223311312), we get a palindrome (3354444533).

The spelling of 2131133221 in words is "two billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twenty-one".