204243121024133 has 4 divisors (see below), whose sum is σ = 205037841339660. Its totient is φ = 203448400708608.

The previous prime is 204243121024127. The next prime is 204243121024139. The reversal of 204243121024133 is 331420121342402.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (204243121024127) and next prime (204243121024139).

It can be written as a sum of positive squares in 2 ways, for example, as 194322429041764 + 9920691982369 = 13939958^2 + 3149713^2 .

It is a cyclic number.

It is not a de Polignac number, because 204243121024133 - 2³⁶ = 204174401547397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204243121024133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243121024139) 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, 397360157378 + ... + 397360157891.

It is an arithmetic number, because the mean of its divisors is an integer number (51259460334915).

Almost surely, 2^{204243121024133} is an apocalyptic number.

It is an amenable number.

204243121024133 is a deficient number, since it is larger than the sum of its proper divisors (794720315527).

204243121024133 is an equidigital number, since it uses as much as digits as its factorization.

204243121024133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794720315526.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 204243121024133 its reverse (331420121342402), we get a palindrome (535663242366535).

The spelling of 204243121024133 in words is "two hundred four trillion, two hundred forty-three billion, one hundred twenty-one million, twenty-four thousand, one hundred thirty-three".