11210221111 has 4 divisors (see below), whose sum is σ = 11377537912. Its totient is φ = 11042904312.

The previous prime is 11210221109. The next prime is 11210221123. The reversal of 11210221111 is 11112201211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112201211 = 47 ⋅236429813.

It is a cyclic number.

It is not a de Polignac number, because 11210221111 - 2¹ = 11210221109 is a prime.

It is a super-4 number, since 4×11210221111⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11210221091 and 11210221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210221151) 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, 83658300 + ... + 83658433.

It is an arithmetic number, because the mean of its divisors is an integer number (2844384478).

Almost surely, 2^11210221111 is an apocalyptic number.

11210221111 is a deficient number, since it is larger than the sum of its proper divisors (167316801).

11210221111 is an equidigital number, since it uses as much as digits as its factorization.

11210221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167316800.

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

Adding to 11210221111 its reverse (11112201211), we get a palindrome (22322422322).

The spelling of 11210221111 in words is "eleven billion, two hundred ten million, two hundred twenty-one thousand, one hundred eleven".