222701021 has 2 divisors, whose sum is σ = 222701022. Its totient is φ = 222701020.

The previous prime is 222701009. The next prime is 222701077. The reversal of 222701021 is 120107222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151905625 + 70795396 = 12325^2 + 8414^2 .

It is a cyclic number.

It is not a de Polignac number, because 222701021 - 2¹⁸ = 222438877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222701321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111350510 + 111350511.

It is an arithmetic number, because the mean of its divisors is an integer number (111350511).

Almost surely, 2^222701021 is an apocalyptic number.

It is an amenable number.

222701021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222701021 is an equidigital number, since it uses as much as digits as its factorization.

222701021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 222701021 is about 14923.1706081516. The cubic root of 222701021 is about 606.1415697815.

Adding to 222701021 its reverse (120107222), we get a palindrome (342808243).

The spelling of 222701021 in words is "two hundred twenty-two million, seven hundred one thousand, twenty-one".