204121422004 has 6 divisors (see below), whose sum is σ = 357212488514. Its totient is φ = 102060711000.

The previous prime is 204121421963. The next prime is 204121422053. The reversal of 204121422004 is 400224121402.

It can be written as a sum of positive squares in only one way, i.e., 193512010000 + 10609412004 = 439900^2 + 103002^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515177747 + ... + 25515177754.

Almost surely, 2^204121422004 is an apocalyptic number.

It is an amenable number.

204121422004 is a deficient number, since it is larger than the sum of its proper divisors (153091066510).

204121422004 is a wasteful number, since it uses less digits than its factorization.

204121422004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51030355505 (or 51030355503 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 204121422004 its reverse (400224121402), we get a palindrome (604345543406).

The spelling of 204121422004 in words is "two hundred four billion, one hundred twenty-one million, four hundred twenty-two thousand, four".