11220221211 has 16 divisors (see below), whose sum is σ = 15597052416. Its totient is φ = 7168333536.

The previous prime is 11220221203. The next prime is 11220221213. The reversal of 11220221211 is 11212202211.

It is not a de Polignac number, because 11220221211 - 2³ = 11220221203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11220221213) 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, 813715 + ... + 827388.

It is an arithmetic number, because the mean of its divisors is an integer number (974815776).

Almost surely, 2^11220221211 is an apocalyptic number.

11220221211 is a deficient number, since it is larger than the sum of its proper divisors (4376831205).

11220221211 is a wasteful number, since it uses less digits than its factorization.

11220221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641202.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11220221211 its reverse (11212202211), we get a palindrome (22432423422).

The spelling of 11220221211 in words is "eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".