11220220100021 has 4 divisors (see below), whose sum is σ = 11220242107500. Its totient is φ = 11220198092544.

The previous prime is 11220220099909. The next prime is 11220220100051. The reversal of 11220220100021 is 12000102202211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8851963800625 + 2368256299396 = 2975225^2 + 1538914^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220220100021 - 2³⁸ = 10945342193077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220220099969 and 11220220100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220220100051) 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, 10220396 + ... + 11264853.

It is an arithmetic number, because the mean of its divisors is an integer number (2805060526875).

Almost surely, 2^{11220220100021} is an apocalyptic number.

It is an amenable number.

11220220100021 is a deficient number, since it is larger than the sum of its proper divisors (22007479).

11220220100021 is an equidigital number, since it uses as much as digits as its factorization.

11220220100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22007478.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11220220100021 its reverse (12000102202211), we get a palindrome (23220322302232).

The spelling of 11220220100021 in words is "eleven trillion, two hundred twenty billion, two hundred twenty million, one hundred thousand, twenty-one".