11202212221121 has 4 divisors (see below), whose sum is σ = 11202247983492. Its totient is φ = 11202176458752.

The previous prime is 11202212221103. The next prime is 11202212221201. The reversal of 11202212221121 is 12112221220211.

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 3856160891521 + 7346051329600 = 1963711^2 + 2710360^2 .

It is a cyclic number.

It is not a de Polignac number, because 11202212221121 - 2³⁴ = 11185032351937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202212221093 and 11202212221102.

It is not an unprimeable number, because it can be changed into a prime (11202212221021) 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, 17407136 + ... + 18039201.

It is an arithmetic number, because the mean of its divisors is an integer number (2800561995873).

Almost surely, 2^{11202212221121} is an apocalyptic number.

It is an amenable number.

11202212221121 is a deficient number, since it is larger than the sum of its proper divisors (35762371).

11202212221121 is an equidigital number, since it uses as much as digits as its factorization.

11202212221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35762370.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11202212221121 its reverse (12112221220211), we get a palindrome (23314433441332).

The spelling of 11202212221121 in words is "eleven trillion, two hundred two billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".