221331203130 has 64 divisors (see below), whose sum is σ = 550415720448. Its totient is φ = 56900489280.

The previous prime is 221331203111. The next prime is 221331203221. The reversal of 221331203130 is 31302133122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221331203097 and 221331203106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207864 + ... + 697043.

It is an arithmetic number, because the mean of its divisors is an integer number (8600245632).

Almost surely, 2^221331203130 is an apocalyptic number.

221331203130 is an abundant number, since it is smaller than the sum of its proper divisors (329084517318).

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

221331203130 is a wasteful number, since it uses less digits than its factorization.

221331203130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905211.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 221331203130 its reverse (31302133122), we get a palindrome (252633336252).

The spelling of 221331203130 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred three thousand, one hundred thirty".