222043021 has 2 divisors, whose sum is σ = 222043022. Its totient is φ = 222043020.

The previous prime is 222042983. The next prime is 222043027. The reversal of 222043021 is 120340222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215355625 + 6687396 = 14675^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 222043021 - 2⁷ = 222042893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222042986 and 222043004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222043027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111021510 + 111021511.

It is an arithmetic number, because the mean of its divisors is an integer number (111021511).

Almost surely, 2^222043021 is an apocalyptic number.

It is an amenable number.

222043021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222043021 is an equidigital number, since it uses as much as digits as its factorization.

222043021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 222043021 is about 14901.1080460481. The cubic root of 222043021 is about 605.5440053772.

Adding to 222043021 its reverse (120340222), we get a palindrome (342383243).

The spelling of 222043021 in words is "two hundred twenty-two million, forty-three thousand, twenty-one".