1223401321 has 2 divisors, whose sum is σ = 1223401322. Its totient is φ = 1223401320.

The previous prime is 1223401273. The next prime is 1223401357. The reversal of 1223401321 is 1231043221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631014400 + 592386921 = 25120^2 + 24339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223401321 - 2²¹ = 1221304169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223401381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611700660 + 611700661.

It is an arithmetic number, because the mean of its divisors is an integer number (611700661).

Almost surely, 2^1223401321 is an apocalyptic number.

It is an amenable number.

1223401321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223401321 is an equidigital number, since it uses as much as digits as its factorization.

1223401321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1223401321 is about 34977.1542724676. The cubic root of 1223401321 is about 1069.5218176598.

Adding to 1223401321 its reverse (1231043221), we get a palindrome (2454444542).

The spelling of 1223401321 in words is "one billion, two hundred twenty-three million, four hundred one thousand, three hundred twenty-one".