204042211414421 has 4 divisors (see below), whose sum is σ = 204343603160172. Its totient is φ = 203740819668672.

The previous prime is 204042211414403. The next prime is 204042211414439. The reversal of 204042211414421 is 124414112240402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (204042211414403) and next prime (204042211414439).

It can be written as a sum of positive squares in 2 ways, for example, as 120145954354321 + 83896257060100 = 10961111^2 + 9159490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204042211414421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204042211414441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150695871860 + ... + 150695873213.

It is an arithmetic number, because the mean of its divisors is an integer number (51085900790043).

Almost surely, 2^{204042211414421} is an apocalyptic number.

It is an amenable number.

204042211414421 is a deficient number, since it is larger than the sum of its proper divisors (301391745751).

204042211414421 is an equidigital number, since it uses as much as digits as its factorization.

204042211414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301391745750.

The product of its (nonzero) digits is 16384, while the sum is 32.

Adding to 204042211414421 its reverse (124414112240402), we get a palindrome (328456323654823).

The spelling of 204042211414421 in words is "two hundred four trillion, forty-two billion, two hundred eleven million, four hundred fourteen thousand, four hundred twenty-one".