1221346067 has 2 divisors, whose sum is σ = 1221346068. Its totient is φ = 1221346066.

The previous prime is 1221346051. The next prime is 1221346073. The reversal of 1221346067 is 7606431221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221346067 - 2⁴ = 1221346051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221346037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610673033 + 610673034.

It is an arithmetic number, because the mean of its divisors is an integer number (610673034).

Almost surely, 2^1221346067 is an apocalyptic number.

1221346067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221346067 is an equidigital number, since it uses as much as digits as its factorization.

1221346067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1221346067 is about 34947.7619741236. The cubic root of 1221346067 is about 1068.9225672944.

Adding to 1221346067 its reverse (7606431221), we get a palindrome (8827777288).

The spelling of 1221346067 in words is "one billion, two hundred twenty-one million, three hundred forty-six thousand, sixty-seven".