221110112211011 has 4 divisors (see below), whose sum is σ = 234116589399912. Its totient is φ = 208103635022112.

The previous prime is 221110112210987. The next prime is 221110112211029. The reversal of 221110112211011 is 110112211011122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221110112211011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13006477188883 = 221110112211011 / (2 + 2 + 1 + 1 + 1 + 0 + 1 + 1 + 2 + 2 + 1 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221110112211091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503238594425 + ... + 6503238594458.

It is an arithmetic number, because the mean of its divisors is an integer number (58529147349978).

Almost surely, 2^{221110112211011} is an apocalyptic number.

221110112211011 is a deficient number, since it is larger than the sum of its proper divisors (13006477188901).

221110112211011 is a wasteful number, since it uses less digits than its factorization.

221110112211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006477188900.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 221110112211011 its reverse (110112211011122), we get a palindrome (331222323222133).

The spelling of 221110112211011 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twelve million, two hundred eleven thousand, eleven".