11221020211121 has 4 divisors (see below), whose sum is σ = 12824023098432. Its totient is φ = 9618017323812.

The previous prime is 11221020211099. The next prime is 11221020211139. The reversal of 11221020211121 is 12111202012211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11221020211121 - 2³⁴ = 11203840341937 is a prime.

It is a super-2 number, since 2×11221020211121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221020211121.

It is not an unprimeable number, because it can be changed into a prime (11221020211421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801501443645 + ... + 801501443658.

It is an arithmetic number, because the mean of its divisors is an integer number (3206005774608).

Almost surely, 2^{11221020211121} is an apocalyptic number.

It is an amenable number.

11221020211121 is a deficient number, since it is larger than the sum of its proper divisors (1603002887311).

11221020211121 is an equidigital number, since it uses as much as digits as its factorization.

11221020211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603002887310.

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

Adding to 11221020211121 its reverse (12111202012211), we get a palindrome (23332222223332).

The spelling of 11221020211121 in words is "eleven trillion, two hundred twenty-one billion, twenty million, two hundred eleven thousand, one hundred twenty-one".