1221404238983 has 2 divisors, whose sum is σ = 1221404238984. Its totient is φ = 1221404238982.

The previous prime is 1221404238973. The next prime is 1221404239021. The reversal of 1221404238983 is 3898324041221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221404238983 - 2⁶ = 1221404238919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221404238953) 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, 610702119491 + 610702119492.

It is an arithmetic number, because the mean of its divisors is an integer number (610702119492).

Almost surely, 2^{1221404238983} is an apocalyptic number.

1221404238983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221404238983 is an equidigital number, since it uses as much as digits as its factorization.

1221404238983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 1221404238983 in words is "one trillion, two hundred twenty-one billion, four hundred four million, two hundred thirty-eight thousand, nine hundred eighty-three".