1321321212347 has 2 divisors, whose sum is σ = 1321321212348. Its totient is φ = 1321321212346.

The previous prime is 1321321212287. The next prime is 1321321212361. The reversal of 1321321212347 is 7432121231231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321321212347 - 2¹⁰ = 1321321211323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321321212647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660660606173 + 660660606174.

It is an arithmetic number, because the mean of its divisors is an integer number (660660606174).

Almost surely, 2^{1321321212347} is an apocalyptic number.

1321321212347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321321212347 is an equidigital number, since it uses as much as digits as its factorization.

1321321212347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

Adding to 1321321212347 its reverse (7432121231231), we get a palindrome (8753442443578).

The spelling of 1321321212347 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, two hundred twelve thousand, three hundred forty-seven".