221303123130 has 64 divisors (see below), whose sum is σ = 547046236800. Its totient is φ = 57254563584.

The previous prime is 221303123123. The next prime is 221303123189. The reversal of 221303123130 is 31321303122.

It is a junction number, because it is equal to n+sod(n) for n = 221303123097 and 221303123106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101757 + ... + 673023.

It is an arithmetic number, because the mean of its divisors is an integer number (8547597450).

Almost surely, 2^221303123130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221303123130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273523118400).

221303123130 is an abundant number, since it is smaller than the sum of its proper divisors (325743113670).

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

221303123130 is a wasteful number, since it uses less digits than its factorization.

221303123130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571663.

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

Adding to 221303123130 its reverse (31321303122), we get a palindrome (252624426252).

The spelling of 221303123130 in words is "two hundred twenty-one billion, three hundred three million, one hundred twenty-three thousand, one hundred thirty".