2043041221 has 4 divisors (see below), whose sum is σ = 2200198252. Its totient is φ = 1885884192.

The previous prime is 2043041197. The next prime is 2043041227. The reversal of 2043041221 is 1221403402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221403402 = 2 ⋅610701701.

It can be written as a sum of positive squares in 2 ways, for example, as 982822500 + 1060218721 = 31350^2 + 32561^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043041221 - 2¹⁵ = 2043008453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043041227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78578496 + ... + 78578521.

It is an arithmetic number, because the mean of its divisors is an integer number (550049563).

Almost surely, 2^2043041221 is an apocalyptic number.

It is an amenable number.

2043041221 is a deficient number, since it is larger than the sum of its proper divisors (157157031).

2043041221 is a wasteful number, since it uses less digits than its factorization.

2043041221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157157030.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2043041221 is about 45200.0135066352. The cubic root of 2043041221 is about 1268.8950690941.

Adding to 2043041221 its reverse (1221403402), we get a palindrome (3264444623).

The spelling of 2043041221 in words is "two billion, forty-three million, forty-one thousand, two hundred twenty-one".