204013241221 has 2 divisors, whose sum is σ = 204013241222. Its totient is φ = 204013241220.

The previous prime is 204013241219. The next prime is 204013241239. The reversal of 204013241221 is 122142310402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158791092196 + 45222149025 = 398486^2 + 212655^2 .

It is a cyclic number.

It is not a de Polignac number, because 204013241221 - 2¹ = 204013241219 is a prime.

Together with 204013241219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 204013241192 and 204013241201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204013341221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102006620610 + 102006620611.

It is an arithmetic number, because the mean of its divisors is an integer number (102006620611).

Almost surely, 2^204013241221 is an apocalyptic number.

It is an amenable number.

204013241221 is a deficient number, since it is larger than the sum of its proper divisors (1).

204013241221 is an equidigital number, since it uses as much as digits as its factorization.

204013241221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 204013241221 its reverse (122142310402), we get a palindrome (326155551623).

The spelling of 204013241221 in words is "two hundred four billion, thirteen million, two hundred forty-one thousand, two hundred twenty-one".