11103213013121 has 4 divisors (see below), whose sum is σ = 11285232898644. Its totient is φ = 10921193127600.

The previous prime is 11103213013099. The next prime is 11103213013147. The reversal of 11103213013121 is 12131031230111.

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 5977340419600 + 5125872593521 = 2444860^2 + 2264039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11103213013121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11103213013093 and 11103213013102.

It is not an unprimeable number, because it can be changed into a prime (11103213012121) 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, 91009942670 + ... + 91009942791.

It is an arithmetic number, because the mean of its divisors is an integer number (2821308224661).

Almost surely, 2^{11103213013121} is an apocalyptic number.

It is an amenable number.

11103213013121 is a deficient number, since it is larger than the sum of its proper divisors (182019885523).

11103213013121 is an equidigital number, since it uses as much as digits as its factorization.

11103213013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182019885522.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 11103213013121 its reverse (12131031230111), we get a palindrome (23234244243232).

The spelling of 11103213013121 in words is "eleven trillion, one hundred three billion, two hundred thirteen million, thirteen thousand, one hundred twenty-one".