2043011221 has 2 divisors, whose sum is σ = 2043011222. Its totient is φ = 2043011220.

The previous prime is 2043011213. The next prime is 2043011251. The reversal of 2043011221 is 1221103402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2035002321 + 8008900 = 45111^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043011221 - 2³ = 2043011213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2043011195 and 2043011204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043011251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021505610 + 1021505611.

It is an arithmetic number, because the mean of its divisors is an integer number (1021505611).

Almost surely, 2^2043011221 is an apocalyptic number.

It is an amenable number.

2043011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043011221 is an equidigital number, since it uses as much as digits as its factorization.

2043011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2043011221 is about 45199.6816471090. The cubic root of 2043011221 is about 1268.8888582489. Note that the first 4 decimals are identical.

Adding to 2043011221 its reverse (1221103402), we get a palindrome (3264114623).

The spelling of 2043011221 in words is "two billion, forty-three million, eleven thousand, two hundred twenty-one".