1221302227 has 2 divisors, whose sum is σ = 1221302228. Its totient is φ = 1221302226.

The previous prime is 1221302213. The next prime is 1221302237. The reversal of 1221302227 is 7222031221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221302227 - 2⁷ = 1221302099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221302198 and 1221302207.

It is not a weakly prime, because it can be changed into another prime (1221302237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610651113 + 610651114.

It is an arithmetic number, because the mean of its divisors is an integer number (610651114).

Almost surely, 2^1221302227 is an apocalyptic number.

1221302227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221302227 is an equidigital number, since it uses as much as digits as its factorization.

1221302227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1221302227 is about 34947.1347466427. The cubic root of 1221302227 is about 1068.9097775462.

Adding to 1221302227 its reverse (7222031221), we get a palindrome (8443333448).

The spelling of 1221302227 in words is "one billion, two hundred twenty-one million, three hundred two thousand, two hundred twenty-seven".