11001003121 has 2 divisors, whose sum is σ = 11001003122. Its totient is φ = 11001003120.

The previous prime is 11001003119. The next prime is 11001003131. The reversal of 11001003121 is 12130010011.

It is an a-pointer prime, because the next prime (11001003131) can be obtained adding 11001003121 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10959786721 + 41216400 = 104689^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001003121 - 2¹ = 11001003119 is a prime.

Together with 11001003119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11001003098 and 11001003107.

It is not a weakly prime, because it can be changed into another prime (11001003131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500501560 + 5500501561.

It is an arithmetic number, because the mean of its divisors is an integer number (5500501561).

Almost surely, 2^11001003121 is an apocalyptic number.

It is an amenable number.

11001003121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001003121 is an equidigital number, since it uses as much as digits as its factorization.

11001003121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11001003121 its reverse (12130010011), we get a palindrome (23131013132).

The spelling of 11001003121 in words is "eleven billion, one million, three thousand, one hundred twenty-one".