2043131221 has 2 divisors, whose sum is σ = 2043131222. Its totient is φ = 2043131220.

The previous prime is 2043131203. The next prime is 2043131249. The reversal of 2043131221 is 1221313402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096338321 + 946792900 = 33111^2 + 30770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043131221 - 2⁷ = 2043131093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043131201) 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 as a sum of consecutive naturals, namely, 1021565610 + 1021565611.

It is an arithmetic number, because the mean of its divisors is an integer number (1021565611).

Almost surely, 2^2043131221 is an apocalyptic number.

It is an amenable number.

2043131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043131221 is an equidigital number, since it uses as much as digits as its factorization.

2043131221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2043131221 is about 45201.0090705949. The cubic root of 2043131221 is about 1268.9137012649.

Adding to 2043131221 its reverse (1221313402), we get a palindrome (3264444623).

The spelling of 2043131221 in words is "two billion, forty-three million, one hundred thirty-one thousand, two hundred twenty-one".