1221075227 has 2 divisors, whose sum is σ = 1221075228. Its totient is φ = 1221075226.

The previous prime is 1221075203. The next prime is 1221075281. The reversal of 1221075227 is 7225701221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221075227 - 2²² = 1216880923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221075227.

It is not a weakly prime, because it can be changed into another prime (1221075127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610537613 + 610537614.

It is an arithmetic number, because the mean of its divisors is an integer number (610537614).

Almost surely, 2^1221075227 is an apocalyptic number.

1221075227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221075227 is an equidigital number, since it uses as much as digits as its factorization.

1221075227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1221075227 is about 34943.8868330356. The cubic root of 1221075227 is about 1068.8435483610.

Adding to 1221075227 its reverse (7225701221), we get a palindrome (8446776448).

The spelling of 1221075227 in words is "one billion, two hundred twenty-one million, seventy-five thousand, two hundred twenty-seven".