11200220122221 has 48 divisors (see below), whose sum is σ = 17457205911600. Its totient is φ = 6878748635136.

The previous prime is 11200220122067. The next prime is 11200220122283. The reversal of 11200220122221 is 12222102200211.

It is a happy number.

11200220122221 is a `hidden beast` number, since 1 + 1 + 200 + 220 + 1 + 22 + 221 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2301865496100 + 8898354626121 = 1517190^2 + 2983011^2 .

It is not a de Polignac number, because 11200220122221 - 2¹⁸ = 11200219860077 is a prime.

It is a super-4 number, since 4×11200220122221⁴ (a number of 53 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11200220122194 and 11200220122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200220122291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173321565 + ... + 173386173.

It is an arithmetic number, because the mean of its divisors is an integer number (363691789825).

Almost surely, 2^{11200220122221} is an apocalyptic number.

It is an amenable number.

11200220122221 is a deficient number, since it is larger than the sum of its proper divisors (6256985789379).

11200220122221 is a wasteful number, since it uses less digits than its factorization.

11200220122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67550 (or 67547 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11200220122221 its reverse (12222102200211), we get a palindrome (23422322322432).

The spelling of 11200220122221 in words is "eleven trillion, two hundred billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".