1223321381 has 2 divisors, whose sum is σ = 1223321382. Its totient is φ = 1223321380.

The previous prime is 1223321353. The next prime is 1223321483. The reversal of 1223321381 is 1831233221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223250625 + 70756 = 34975^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223321381 - 2⁶ = 1223321317 is a prime.

It is a super-2 number, since 2×1223321381² = 2993030402423494322, 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 1223321381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223321081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611660690 + 611660691.

It is an arithmetic number, because the mean of its divisors is an integer number (611660691).

Almost surely, 2^1223321381 is an apocalyptic number.

It is an amenable number.

1223321381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223321381 is an equidigital number, since it uses as much as digits as its factorization.

1223321381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 1223321381 is about 34976.0115078892. The cubic root of 1223321381 is about 1069.4985221053.

The spelling of 1223321381 in words is "one billion, two hundred twenty-three million, three hundred twenty-one thousand, three hundred eighty-one".