1204421221999 has 2 divisors, whose sum is σ = 1204421222000. Its totient is φ = 1204421221998.

The previous prime is 1204421221921. The next prime is 1204421222083. The reversal of 1204421221999 is 9991221244021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1204421221999 - 2²³ = 1204412833391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204421221099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602210610999 + 602210611000.

It is an arithmetic number, because the mean of its divisors is an integer number (602210611000).

Almost surely, 2^{1204421221999} is an apocalyptic number.

1204421221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204421221999 is an equidigital number, since it uses as much as digits as its factorization.

1204421221999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 1204421221999 in words is "one trillion, two hundred four billion, four hundred twenty-one million, two hundred twenty-one thousand, nine hundred ninety-nine".