11221131011 has 4 divisors (see below), whose sum is σ = 11336812872. Its totient is φ = 11105449152.

The previous prime is 11221131001. The next prime is 11221131013. The reversal of 11221131011 is 11013112211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11221131011 - 2¹⁰ = 11221129987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221131013) 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, 57840785 + ... + 57840978.

It is an arithmetic number, because the mean of its divisors is an integer number (2834203218).

Almost surely, 2^11221131011 is an apocalyptic number.

11221131011 is a deficient number, since it is larger than the sum of its proper divisors (115681861).

11221131011 is an equidigital number, since it uses as much as digits as its factorization.

11221131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115681860.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11221131011 its reverse (11013112211), we get a palindrome (22234243222).

The spelling of 11221131011 in words is "eleven billion, two hundred twenty-one million, one hundred thirty-one thousand, eleven".