11111221020211 has 32 divisors (see below), whose sum is σ = 12770875127808. Its totient is φ = 9576199987200.

The previous prime is 11111221020203. The next prime is 11111221020247. The reversal of 11111221020211 is 11202012211111.

It is not a de Polignac number, because 11111221020211 - 2³ = 11111221020203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111221020281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466826511 + ... + 466850311.

It is an arithmetic number, because the mean of its divisors is an integer number (399089847744).

Almost surely, 2^{11111221020211} is an apocalyptic number.

11111221020211 is a deficient number, since it is larger than the sum of its proper divisors (1659654107597).

11111221020211 is a wasteful number, since it uses less digits than its factorization.

11111221020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40591.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11111221020211 its reverse (11202012211111), we get a palindrome (22313233231322).

The spelling of 11111221020211 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, twenty thousand, two hundred eleven".