204322321021 has 16 divisors (see below), whose sum is σ = 251655875968. Its totient is φ = 161544456000.

The previous prime is 204322320991. The next prime is 204322321031. The reversal of 204322321021 is 120123223402.

It is a cyclic number.

It is not a de Polignac number, because 204322321021 - 2⁵ = 204322320989 is a prime.

It is a super-2 number, since 2×204322321021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204322320983 and 204322321001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204322321031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687255 + ... + 938596.

It is an arithmetic number, because the mean of its divisors is an integer number (15728492248).

Almost surely, 2^204322321021 is an apocalyptic number.

It is an amenable number.

204322321021 is a deficient number, since it is larger than the sum of its proper divisors (47333554947).

204322321021 is a wasteful number, since it uses less digits than its factorization.

204322321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627252.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 204322321021 its reverse (120123223402), we get a palindrome (324445544423).

The spelling of 204322321021 in words is "two hundred four billion, three hundred twenty-two million, three hundred twenty-one thousand, twenty-one".