204421222125401 has 2 divisors, whose sum is σ = 204421222125402. Its totient is φ = 204421222125400.

The previous prime is 204421222125353. The next prime is 204421222125403. The reversal of 204421222125401 is 104521222124402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148346285703001 + 56074936422400 = 12179749^2 + 7488320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204421222125401 is a prime.

It is a Sophie Germain prime.

Together with 204421222125403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (204421222125403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102210611062700 + 102210611062701.

It is an arithmetic number, because the mean of its divisors is an integer number (102210611062701).

Almost surely, 2^{204421222125401} is an apocalyptic number.

It is an amenable number.

204421222125401 is a deficient number, since it is larger than the sum of its proper divisors (1).

204421222125401 is an equidigital number, since it uses as much as digits as its factorization.

204421222125401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 32.

Adding to 204421222125401 its reverse (104521222124402), we get a palindrome (308942444249803).

Subtracting from 204421222125401 its reverse (104521222124402), we obtain a palindrome (99900000000999).

The spelling of 204421222125401 in words is "two hundred four trillion, four hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-five thousand, four hundred one".