1211421227 has 2 divisors, whose sum is σ = 1211421228. Its totient is φ = 1211421226.

The previous prime is 1211421199. The next prime is 1211421257. The reversal of 1211421227 is 7221241121.

It is a weak prime.

It is an emirp because it is prime and its reverse (7221241121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211421227 - 2⁶ = 1211421163 is a prime.

It is a super-3 number, since 3×1211421227³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1211421257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605710613 + 605710614.

It is an arithmetic number, because the mean of its divisors is an integer number (605710614).

Almost surely, 2^1211421227 is an apocalyptic number.

1211421227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211421227 is an equidigital number, since it uses as much as digits as its factorization.

1211421227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 23.

The square root of 1211421227 is about 34805.4769684313. The cubic root of 1211421227 is about 1066.0192808742.

Adding to 1211421227 its reverse (7221241121), we get a palindrome (8432662348).

The spelling of 1211421227 in words is "one billion, two hundred eleven million, four hundred twenty-one thousand, two hundred twenty-seven".