2043221100209 has 2 divisors, whose sum is σ = 2043221100210. Its totient is φ = 2043221100208.

The previous prime is 2043221100197. The next prime is 2043221100223. The reversal of 2043221100209 is 9020011223402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1351529477809 + 691691622400 = 1162553^2 + 831680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2043221100209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2043221108209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021610550104 + 1021610550105.

It is an arithmetic number, because the mean of its divisors is an integer number (1021610550105).

Almost surely, 2^{2043221100209} is an apocalyptic number.

It is an amenable number.

2043221100209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043221100209 is an equidigital number, since it uses as much as digits as its factorization.

2043221100209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 2043221100209 in words is "two trillion, forty-three billion, two hundred twenty-one million, one hundred thousand, two hundred nine".