11000120111221 has 4 divisors (see below), whose sum is σ = 11025524546092. Its totient is φ = 10974715676352.

The previous prime is 11000120111219. The next prime is 11000120111293. The reversal of 11000120111221 is 12211102100011.

It is a happy number.

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 1767607476196 + 9232512635025 = 1329514^2 + 3038505^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000120111221 - 2¹ = 11000120111219 is a prime.

It is a super-2 number, since 2×11000120111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000120115221) 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, 12702216786 + ... + 12702217651.

It is an arithmetic number, because the mean of its divisors is an integer number (2756381136523).

Almost surely, 2^{11000120111221} is an apocalyptic number.

It is an amenable number.

11000120111221 is a deficient number, since it is larger than the sum of its proper divisors (25404434871).

11000120111221 is an equidigital number, since it uses as much as digits as its factorization.

11000120111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25404434870.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11000120111221 its reverse (12211102100011), we get a palindrome (23211222211232).

The spelling of 11000120111221 in words is "eleven trillion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".