1214227381 has 2 divisors, whose sum is σ = 1214227382. Its totient is φ = 1214227380.

The previous prime is 1214227369. The next prime is 1214227429. The reversal of 1214227381 is 1837224121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945562500 + 268664881 = 30750^2 + 16391^2 .

It is an emirp because it is prime and its reverse (1837224121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214227381 - 2⁷ = 1214227253 is a prime.

It is a super-2 number, since 2×1214227381² = 2948696265540238322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214227321) 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, 607113690 + 607113691.

It is an arithmetic number, because the mean of its divisors is an integer number (607113691).

Almost surely, 2^1214227381 is an apocalyptic number.

It is an amenable number.

1214227381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214227381 is an equidigital number, since it uses as much as digits as its factorization.

1214227381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 1214227381 is about 34845.7656107597. The cubic root of 1214227381 is about 1066.8417603952.

The spelling of 1214227381 in words is "one billion, two hundred fourteen million, two hundred twenty-seven thousand, three hundred eighty-one".