1221412067 has 2 divisors, whose sum is σ = 1221412068. Its totient is φ = 1221412066.

The previous prime is 1221412021. The next prime is 1221412097. The reversal of 1221412067 is 7602141221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7602141221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221412067 - 2²² = 1217217763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221412097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610706033 + 610706034.

It is an arithmetic number, because the mean of its divisors is an integer number (610706034).

Almost surely, 2^1221412067 is an apocalyptic number.

1221412067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221412067 is an equidigital number, since it uses as much as digits as its factorization.

1221412067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1221412067 is about 34948.7062278420. The cubic root of 1221412067 is about 1068.9418213564.

Adding to 1221412067 its reverse (7602141221), we get a palindrome (8823553288).

The spelling of 1221412067 in words is "one billion, two hundred twenty-one million, four hundred twelve thousand, sixty-seven".