11001222021211 has 4 divisors (see below), whose sum is σ = 11012838940872. Its totient is φ = 10989605101552.

The previous prime is 11001222021199. The next prime is 11001222021233. The reversal of 11001222021211 is 11212022210011.

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 11001222021211 - 2⁹ = 11001222020699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001222021271) 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, 5808458410 + ... + 5808460303.

It is an arithmetic number, because the mean of its divisors is an integer number (2753209735218).

Almost surely, 2^{11001222021211} is an apocalyptic number.

11001222021211 is a deficient number, since it is larger than the sum of its proper divisors (11616919661).

11001222021211 is an equidigital number, since it uses as much as digits as its factorization.

11001222021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616919660.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11001222021211 its reverse (11212022210011), we get a palindrome (22213244231222).

The spelling of 11001222021211 in words is "eleven trillion, one billion, two hundred twenty-two million, twenty-one thousand, two hundred eleven".