11121022021211 has 4 divisors (see below), whose sum is σ = 11357639511072. Its totient is φ = 10884404531352.

The previous prime is 11121022021069. The next prime is 11121022021229. The reversal of 11121022021211 is 11212022012111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121022021211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121022021211.

It is not an unprimeable number, because it can be changed into a prime (11121022021231) 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, 118308744860 + ... + 118308744953.

It is an arithmetic number, because the mean of its divisors is an integer number (2839409877768).

Almost surely, 2^{11121022021211} is an apocalyptic number.

11121022021211 is a deficient number, since it is larger than the sum of its proper divisors (236617489861).

11121022021211 is an equidigital number, since it uses as much as digits as its factorization.

11121022021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236617489860.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11121022021211 its reverse (11212022012111), we get a palindrome (22333044033322).

It can be divided in two parts, 1112102 and 2021211, that added together give a palindrome (3133313).

The spelling of 11121022021211 in words is "eleven trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, two hundred eleven".