221120111011 has 16 divisors (see below), whose sum is σ = 226888243200. Its totient is φ = 215397258048.

The previous prime is 221120110997. The next prime is 221120111089. The reversal of 221120111011 is 110111021122.

It is a happy number.

It is not a de Polignac number, because 221120111011 - 2²⁷ = 220985893283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120110982 and 221120111000.

It is not an unprimeable number, because it can be changed into a prime (221120111711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28516711 + ... + 28524463.

It is an arithmetic number, because the mean of its divisors is an integer number (14180515200).

Almost surely, 2^221120111011 is an apocalyptic number.

221120111011 is a deficient number, since it is larger than the sum of its proper divisors (5768132189).

221120111011 is a wasteful number, since it uses less digits than its factorization.

221120111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10578.

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

Adding to 221120111011 its reverse (110111021122), we get a palindrome (331231132133).

The spelling of 221120111011 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, eleven".