11221210111 has 16 divisors (see below), whose sum is σ = 12083680224. Its totient is φ = 10382183424.

The previous prime is 11221210109. The next prime is 11221210127. The reversal of 11221210111 is 11101212211.

It is a happy number.

It is not a de Polignac number, because 11221210111 - 2¹ = 11221210109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221210091 and 11221210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221210181) 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, 366261 + ... + 395713.

It is an arithmetic number, because the mean of its divisors is an integer number (755230014).

Almost surely, 2^11221210111 is an apocalyptic number.

11221210111 is a deficient number, since it is larger than the sum of its proper divisors (862470113).

11221210111 is a wasteful number, since it uses less digits than its factorization.

11221210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29850.

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

Adding to 11221210111 its reverse (11101212211), we get a palindrome (22322422322).

The spelling of 11221210111 in words is "eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred eleven".