204230344231421 has 2 divisors, whose sum is σ = 204230344231422. Its totient is φ = 204230344231420.

The previous prime is 204230344231393. The next prime is 204230344231427. The reversal of 204230344231421 is 124132443032402.

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., 165330349867225 + 38899994364196 = 12858085^2 + 6236986^2 .

It is a cyclic number.

It is not a de Polignac number, because 204230344231421 - 2²² = 204230340037117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204230344231427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102115172115710 + 102115172115711.

It is an arithmetic number, because the mean of its divisors is an integer number (102115172115711).

Almost surely, 2^{204230344231421} is an apocalyptic number.

It is an amenable number.

204230344231421 is a deficient number, since it is larger than the sum of its proper divisors (1).

204230344231421 is an equidigital number, since it uses as much as digits as its factorization.

204230344231421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 204230344231421 its reverse (124132443032402), we get a palindrome (328362787263823).

The spelling of 204230344231421 in words is "two hundred four trillion, two hundred thirty billion, three hundred forty-four million, two hundred thirty-one thousand, four hundred twenty-one".