204121342401043 has 4 divisors (see below), whose sum is σ = 204121398172888. Its totient is φ = 204121286629200.

The previous prime is 204121342401019. The next prime is 204121342401059. The reversal of 204121342401043 is 340104243121402.

It is a happy number.

204121342401043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204121342401043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204121342400996 and 204121342401014.

It is not an unprimeable number, because it can be changed into a prime (204121342401443) 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, 21978933 + ... + 29854918.

It is an arithmetic number, because the mean of its divisors is an integer number (51030349543222).

Almost surely, 2^{204121342401043} is an apocalyptic number.

204121342401043 is a deficient number, since it is larger than the sum of its proper divisors (55771845).

204121342401043 is an equidigital number, since it uses as much as digits as its factorization.

204121342401043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55771844.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 204121342401043 its reverse (340104243121402), we get a palindrome (544225585522445).

The spelling of 204121342401043 in words is "two hundred four trillion, one hundred twenty-one billion, three hundred forty-two million, four hundred one thousand, forty-three".