203221120004 has 18 divisors (see below), whose sum is σ = 413700137550. Its totient is φ = 87094765632.

The previous prime is 203221119991. The next prime is 203221120043. The reversal of 203221120004 is 400021122302.

It can be written as a sum of positive squares in only one way, i.e., 176482329604 + 26738790400 = 420098^2 + 163520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 518421029 + ... + 518421420.

It is an arithmetic number, because the mean of its divisors is an integer number (22983340975).

Almost surely, 2^203221120004 is an apocalyptic number.

It is an amenable number.

203221120004 is an abundant number, since it is smaller than the sum of its proper divisors (210479017546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203221120004 is a wasteful number, since it uses less digits than its factorization.

203221120004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036842467 (or 1036842458 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 203221120004 its reverse (400021122302), we get a palindrome (603242242306).

The spelling of 203221120004 in words is "two hundred three billion, two hundred twenty-one million, one hundred twenty thousand, four".