11101220211 has 16 divisors (see below), whose sum is σ = 14965756416. Its totient is φ = 7318945536.

The previous prime is 11101220197. The next prime is 11101220243. The reversal of 11101220211 is 11202210111.

It is not a de Polignac number, because 11101220211 - 2¹³ = 11101212019 is a prime.

It is a super-2 number, since 2×11101220211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11101220261) 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, 205411 + ... + 253763.

It is an arithmetic number, because the mean of its divisors is an integer number (935359776).

Almost surely, 2^11101220211 is an apocalyptic number.

11101220211 is a deficient number, since it is larger than the sum of its proper divisors (3864536205).

11101220211 is a wasteful number, since it uses less digits than its factorization.

11101220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49202.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11101220211 its reverse (11202210111), we get a palindrome (22303430322).

The spelling of 11101220211 in words is "eleven billion, one hundred one million, two hundred twenty thousand, two hundred eleven".