221110221111 has 8 divisors (see below), whose sum is σ = 317491599600. Its totient is φ = 136067828352.

The previous prime is 221110221109. The next prime is 221110221119. The reversal of 221110221111 is 111122011122.

It is a happy number.

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

It is not a de Polignac number, because 221110221111 - 2¹ = 221110221109 is a prime.

It is a super-4 number, since 4×221110221111⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110221119) 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, 2834746386 + ... + 2834746463.

It is an arithmetic number, because the mean of its divisors is an integer number (39686449950).

Almost surely, 2^221110221111 is an apocalyptic number.

221110221111 is a deficient number, since it is larger than the sum of its proper divisors (96381378489).

221110221111 is a wasteful number, since it uses less digits than its factorization.

221110221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669492865.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110221111 its reverse (111122011122), we get a palindrome (332232232233).

The spelling of 221110221111 in words is "two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, one hundred eleven".