1321213011227 has 2 divisors, whose sum is σ = 1321213011228. Its totient is φ = 1321213011226.

The previous prime is 1321213011199. The next prime is 1321213011247. The reversal of 1321213011227 is 7221103121231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321213011227 - 2¹⁸ = 1321212749083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321213011196 and 1321213011205.

It is not a weakly prime, because it can be changed into another prime (1321213011247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606505613 + 660606505614.

It is an arithmetic number, because the mean of its divisors is an integer number (660606505614).

Almost surely, 2^{1321213011227} is an apocalyptic number.

1321213011227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321213011227 is an equidigital number, since it uses as much as digits as its factorization.

1321213011227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 1321213011227 its reverse (7221103121231), we get a palindrome (8542316132458).

The spelling of 1321213011227 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, eleven thousand, two hundred twenty-seven".