204122213213 has 4 divisors (see below), whose sum is σ = 210706800768. Its totient is φ = 197537625660.

The previous prime is 204122213147. The next prime is 204122213219. The reversal of 204122213213 is 312312221402.

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 204122213213 - 2³⁰ = 203048471389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204122213219) 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, 3292293731 + ... + 3292293792.

It is an arithmetic number, because the mean of its divisors is an integer number (52676700192).

Almost surely, 2^204122213213 is an apocalyptic number.

It is an amenable number.

204122213213 is a deficient number, since it is larger than the sum of its proper divisors (6584587555).

204122213213 is an equidigital number, since it uses as much as digits as its factorization.

204122213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584587554.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 204122213213 its reverse (312312221402), we get a palindrome (516434434615).

The spelling of 204122213213 in words is "two hundred four billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred thirteen".