204402245123 has 2 divisors, whose sum is σ = 204402245124. Its totient is φ = 204402245122.

The previous prime is 204402245101. The next prime is 204402245129. The reversal of 204402245123 is 321542204402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204402245123 is a prime.

It is a super-2 number, since 2×204402245123² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (204402245129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102201122561 + 102201122562.

It is an arithmetic number, because the mean of its divisors is an integer number (102201122562).

Almost surely, 2^204402245123 is an apocalyptic number.

204402245123 is a deficient number, since it is larger than the sum of its proper divisors (1).

204402245123 is an equidigital number, since it uses as much as digits as its factorization.

204402245123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 204402245123 its reverse (321542204402), we get a palindrome (525944449525).

The spelling of 204402245123 in words is "two hundred four billion, four hundred two million, two hundred forty-five thousand, one hundred twenty-three".