221030312111 has 8 divisors (see below), whose sum is σ = 252608979360. Its totient is φ = 189452371968.

The previous prime is 221030312021. The next prime is 221030312119. The reversal of 221030312111 is 111213030122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221030312111 - 2¹⁰ = 221030311087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221030312111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030312119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894395 + ... + 1114451.

It is an arithmetic number, because the mean of its divisors is an integer number (31576122420).

Almost surely, 2^221030312111 is an apocalyptic number.

221030312111 is a deficient number, since it is larger than the sum of its proper divisors (31578667249).

221030312111 is a wasteful number, since it uses less digits than its factorization.

221030312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363553.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221030312111 its reverse (111213030122), we get a palindrome (332243342233).

The spelling of 221030312111 in words is "two hundred twenty-one billion, thirty million, three hundred twelve thousand, one hundred eleven".