11121200202121 has 4 divisors (see below), whose sum is σ = 11136885957700. Its totient is φ = 11105514446544.

The previous prime is 11121200201977. The next prime is 11121200202131. The reversal of 11121200202121 is 12120200212111.

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 5457180995721 + 5664019206400 = 2336061^2 + 2379920^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121200202121 - 2⁹ = 11121200201609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121200202095 and 11121200202104.

It is not an unprimeable number, because it can be changed into a prime (11121200202131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7842876726 + ... + 7842878143.

It is an arithmetic number, because the mean of its divisors is an integer number (2784221489425).

Almost surely, 2^{11121200202121} is an apocalyptic number.

It is an amenable number.

11121200202121 is a deficient number, since it is larger than the sum of its proper divisors (15685755579).

11121200202121 is an equidigital number, since it uses as much as digits as its factorization.

11121200202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15685755578.

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

Adding to 11121200202121 its reverse (12120200212111), we get a palindrome (23241400414232).

The spelling of 11121200202121 in words is "eleven trillion, one hundred twenty-one billion, two hundred million, two hundred two thousand, one hundred twenty-one".