221103312030 has 96 divisors (see below), whose sum is σ = 590578043328. Its totient is φ = 57350592000.

The previous prime is 221103312029. The next prime is 221103312061. The reversal of 221103312030 is 30213301122.

221103312030 is a `hidden beast` number, since 22 + 110 + 331 + 203 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221103311994 and 221103312012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14781055 + ... + 14796005.

It is an arithmetic number, because the mean of its divisors is an integer number (6151854618).

Almost surely, 2^221103312030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221103312030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295289021664).

221103312030 is an abundant number, since it is smaller than the sum of its proper divisors (369474731298).

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

221103312030 is a wasteful number, since it uses less digits than its factorization.

221103312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442 (or 19439 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 221103312030 its reverse (30213301122), we get a palindrome (251316613152).

The spelling of 221103312030 in words is "two hundred twenty-one billion, one hundred three million, three hundred twelve thousand, thirty".