204313423023121 has 4 divisors (see below), whose sum is σ = 210904178604544. Its totient is φ = 197722667441700.

The previous prime is 204313423023103. The next prime is 204313423023173. The reversal of 204313423023121 is 121320324313402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204313423023121 - 2⁹ = 204313423022609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 6590755581391 = 204313423023121 / (2 + 0 + 4 + 3 + 1 + 3 + 4 + 2 + 3 + 0 + 2 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204313423093121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3295377790665 + ... + 3295377790726.

It is an arithmetic number, because the mean of its divisors is an integer number (52726044651136).

Almost surely, 2^{204313423023121} is an apocalyptic number.

It is an amenable number.

204313423023121 is a deficient number, since it is larger than the sum of its proper divisors (6590755581423).

204313423023121 is an equidigital number, since it uses as much as digits as its factorization.

204313423023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590755581422.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 204313423023121 its reverse (121320324313402), we get a palindrome (325633747336523).

The spelling of 204313423023121 in words is "two hundred four trillion, three hundred thirteen billion, four hundred twenty-three million, twenty-three thousand, one hundred twenty-one".