11222200111021 has 4 divisors (see below), whose sum is σ = 11222208066492. Its totient is φ = 11222192155552.

The previous prime is 11222200111013. The next prime is 11222200111123. The reversal of 11222200111021 is 12011100222211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7642952338921 + 3579247772100 = 2764589^2 + 1891890^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222200111021 - 2³ = 11222200111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222200110986 and 11222200111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222200141021) 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, 1228336 + ... + 4894201.

It is an arithmetic number, because the mean of its divisors is an integer number (2805552016623).

Almost surely, 2^{11222200111021} is an apocalyptic number.

It is an amenable number.

11222200111021 is a deficient number, since it is larger than the sum of its proper divisors (7955471).

11222200111021 is an equidigital number, since it uses as much as digits as its factorization.

11222200111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955470.

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

Adding to 11222200111021 its reverse (12011100222211), we get a palindrome (23233300333232).

The spelling of 11222200111021 in words is "eleven trillion, two hundred twenty-two billion, two hundred million, one hundred eleven thousand, twenty-one".