1221214024409 has 2 divisors, whose sum is σ = 1221214024410. Its totient is φ = 1221214024408.

The previous prime is 1221214024399. The next prime is 1221214024453. The reversal of 1221214024409 is 9044204121221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1189397454025 + 31816570384 = 1090595^2 + 178372^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221214024409 - 2¹⁶ = 1221213958873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221214024609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610607012204 + 610607012205.

It is an arithmetic number, because the mean of its divisors is an integer number (610607012205).

Almost surely, 2^{1221214024409} is an apocalyptic number.

It is an amenable number.

1221214024409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221214024409 is an equidigital number, since it uses as much as digits as its factorization.

1221214024409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 1221214024409 in words is "one trillion, two hundred twenty-one billion, two hundred fourteen million, twenty-four thousand, four hundred nine".