221311110030 has 64 divisors (see below), whose sum is σ = 563793576768. Its totient is φ = 55406182400.

The previous prime is 221311110029. The next prime is 221311110037. The reversal of 221311110030 is 30011113122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 221311109991 and 221311110009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221311110037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336567 + ... + 745586.

It is an arithmetic number, because the mean of its divisors is an integer number (8809274637).

Almost surely, 2^221311110030 is an apocalyptic number.

221311110030 is an abundant number, since it is smaller than the sum of its proper divisors (342482466738).

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

221311110030 is a wasteful number, since it uses less digits than its factorization.

221311110030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082581.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 221311110030 its reverse (30011113122), we get a palindrome (251322223152).

The spelling of 221311110030 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred ten thousand, thirty".