1123220310221 has 2 divisors, whose sum is σ = 1123220310222. Its totient is φ = 1123220310220.

The previous prime is 1123220310187. The next prime is 1123220310299. The reversal of 1123220310221 is 1220130223211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975183900196 + 148036410025 = 987514^2 + 384755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123220310221 - 2¹⁸ = 1123220048077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123220310193 and 1123220310202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123220370221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561610155110 + 561610155111.

It is an arithmetic number, because the mean of its divisors is an integer number (561610155111).

Almost surely, 2^{1123220310221} is an apocalyptic number.

It is an amenable number.

1123220310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123220310221 is an equidigital number, since it uses as much as digits as its factorization.

1123220310221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1123220310221 its reverse (1220130223211), we get a palindrome (2343350533432).

The spelling of 1123220310221 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, three hundred ten thousand, two hundred twenty-one".