1321011227 has 2 divisors, whose sum is σ = 1321011228. Its totient is φ = 1321011226.

The previous prime is 1321011217. The next prime is 1321011257. The reversal of 1321011227 is 7221101231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321011227 - 2¹⁰ = 1321010203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321011199 and 1321011208.

It is not a weakly prime, because it can be changed into another prime (1321011217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660505613 + 660505614.

It is an arithmetic number, because the mean of its divisors is an integer number (660505614).

Almost surely, 2^1321011227 is an apocalyptic number.

1321011227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321011227 is an equidigital number, since it uses as much as digits as its factorization.

1321011227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1321011227 is about 36345.7181384548. The cubic root of 1321011227 is about 1097.2413594134.

Adding to 1321011227 its reverse (7221101231), we get a palindrome (8542112458).

The spelling of 1321011227 in words is "one billion, three hundred twenty-one million, eleven thousand, two hundred twenty-seven".