1321213417 has 2 divisors, whose sum is σ = 1321213418. Its totient is φ = 1321213416.

The previous prime is 1321213409. The next prime is 1321213441. The reversal of 1321213417 is 7143121231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255214041 + 65999376 = 35429^2 + 8124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321213417 - 2³ = 1321213409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321213391 and 1321213400.

It is not a weakly prime, because it can be changed into another prime (1321213217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606708 + 660606709.

It is an arithmetic number, because the mean of its divisors is an integer number (660606709).

Almost surely, 2^1321213417 is an apocalyptic number.

It is an amenable number.

1321213417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321213417 is an equidigital number, since it uses as much as digits as its factorization.

1321213417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 1321213417 is about 36348.4995151107. The cubic root of 1321213417 is about 1097.2973367102.

Adding to 1321213417 its reverse (7143121231), we get a palindrome (8464334648).

The spelling of 1321213417 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, four hundred seventeen".