2131032221 has 8 divisors (see below), whose sum is σ = 2158905504. Its totient is φ = 2103211440.

The previous prime is 2131032209. The next prime is 2131032247. The reversal of 2131032221 is 1222301312.

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 2131032221 - 2⁶ = 2131032157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131032251) 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, 72170 + ... + 97316.

It is an arithmetic number, because the mean of its divisors is an integer number (269863188).

Almost surely, 2^2131032221 is an apocalyptic number.

It is an amenable number.

2131032221 is a deficient number, since it is larger than the sum of its proper divisors (27873283).

2131032221 is a wasteful number, since it uses less digits than its factorization.

2131032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26251.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2131032221 is about 46163.1045424807. The cubic root of 2131032221 is about 1286.8561588869.

Adding to 2131032221 its reverse (1222301312), we get a palindrome (3353333533).

The spelling of 2131032221 in words is "two billion, one hundred thirty-one million, thirty-two thousand, two hundred twenty-one".