1223013221 has 2 divisors, whose sum is σ = 1223013222. Its totient is φ = 1223013220.

The previous prime is 1223013191. The next prime is 1223013227. The reversal of 1223013221 is 1223103221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040385025 + 182628196 = 32255^2 + 13514^2 .

It is an emirp because it is prime and its reverse (1223103221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223013221 - 2⁶ = 1223013157 is a prime.

It is a super-2 number, since 2×1223013221² = 2991522677481589682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223013221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223013227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611506610 + 611506611.

It is an arithmetic number, because the mean of its divisors is an integer number (611506611).

Almost surely, 2^1223013221 is an apocalyptic number.

It is an amenable number.

1223013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223013221 is an equidigital number, since it uses as much as digits as its factorization.

1223013221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1223013221 is about 34971.6059253789. The cubic root of 1223013221 is about 1069.4087107803.

Adding to 1223013221 its reverse (1223103221), we get a palindrome (2446116442).

Subtracting 1223013221 from its reverse (1223103221), we obtain a square (90000 = 300²).

The spelling of 1223013221 in words is "one billion, two hundred twenty-three million, thirteen thousand, two hundred twenty-one".