221002043 has 2 divisors, whose sum is σ = 221002044. Its totient is φ = 221002042.

The previous prime is 221002031. The next prime is 221002049. The reversal of 221002043 is 340200122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221002043 - 2¹⁴ = 220985659 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501021 + 110501022.

It is an arithmetic number, because the mean of its divisors is an integer number (110501022).

Almost surely, 2^221002043 is an apocalyptic number.

221002043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002043 is an equidigital number, since it uses as much as digits as its factorization.

221002043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 221002043 is about 14866.1374606856. The cubic root of 221002043 is about 604.5962226216.

Adding to 221002043 its reverse (340200122), we get a palindrome (561202165).

The spelling of 221002043 in words is "two hundred twenty-one million, two thousand, forty-three".