204213311122111 has 4 divisors (see below), whose sum is σ = 204255864432000. Its totient is φ = 204170757812224.

The previous prime is 204213311122061. The next prime is 204213311122157. The reversal of 204213311122111 is 111221113312402.

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

It is a cyclic number.

It is not a de Polignac number, because 204213311122111 - 2³⁷ = 204075872168639 is a prime.

It is a super-2 number, since 2×204213311122111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204213311122811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21276647746 + ... + 21276657343.

It is an arithmetic number, because the mean of its divisors is an integer number (51063966108000).

Almost surely, 2^{204213311122111} is an apocalyptic number.

204213311122111 is a deficient number, since it is larger than the sum of its proper divisors (42553309889).

204213311122111 is an equidigital number, since it uses as much as digits as its factorization.

204213311122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42553309888.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 204213311122111 its reverse (111221113312402), we get a palindrome (315434424434513).

The spelling of 204213311122111 in words is "two hundred four trillion, two hundred thirteen billion, three hundred eleven million, one hundred twenty-two thousand, one hundred eleven".