221110112011 has 4 divisors (see below), whose sum is σ = 221150755224. Its totient is φ = 221069468800.

The previous prime is 221110111997. The next prime is 221110112017. The reversal of 221110112011 is 110211011122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221110112011 - 2¹¹ = 221110109963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221110111982 and 221110112000.

It is not an unprimeable number, because it can be changed into a prime (221110112017) 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, 20313445 + ... + 20324326.

It is an arithmetic number, because the mean of its divisors is an integer number (55287688806).

Almost surely, 2^221110112011 is an apocalyptic number.

221110112011 is a deficient number, since it is larger than the sum of its proper divisors (40643213).

221110112011 is an equidigital number, since it uses as much as digits as its factorization.

221110112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40643212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221110112011 its reverse (110211011122), we get a palindrome (331321123133).

The spelling of 221110112011 in words is "two hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, eleven".