1223210123221 has 2 divisors, whose sum is σ = 1223210123222. Its totient is φ = 1223210123220.

The previous prime is 1223210123207. The next prime is 1223210123227.

1223210123221 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1027526868900 + 195683254321 = 1013670^2 + 442361^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1223210123221 - 2⁹ = 1223210122709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223210123192 and 1223210123201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223210123227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611605061610 + 611605061611.

It is an arithmetic number, because the mean of its divisors is an integer number (611605061611).

Almost surely, 2^{1223210123221} is an apocalyptic number.

It is an amenable number.

1223210123221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223210123221 is an equidigital number, since it uses as much as digits as its factorization.

1223210123221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 1223210 and 123221, that added together give a palindrome (1346431).

The spelling of 1223210123221 in words is "one trillion, two hundred twenty-three billion, two hundred ten million, one hundred twenty-three thousand, two hundred twenty-one".