1011230221 has 2 divisors, whose sum is σ = 1011230222. Its totient is φ = 1011230220.

The previous prime is 1011230149. The next prime is 1011230279. The reversal of 1011230221 is 1220321101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952401321 + 58828900 = 30861^2 + 7670^2 .

It is an emirp because it is prime and its reverse (1220321101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011230221 - 2²³ = 1002841613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011230621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505615110 + 505615111.

It is an arithmetic number, because the mean of its divisors is an integer number (505615111).

Almost surely, 2^1011230221 is an apocalyptic number.

It is an amenable number.

1011230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011230221 is an equidigital number, since it uses as much as digits as its factorization.

1011230221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1011230221 is about 31799.8462417666. The cubic root of 1011230221 is about 1003.7294806827.

Adding to 1011230221 its reverse (1220321101), we get a palindrome (2231551322).

The spelling of 1011230221 in words is "one billion, eleven million, two hundred thirty thousand, two hundred twenty-one".