11303312121 has 12 divisors (see below), whose sum is σ = 17287418772. Its totient is φ = 7092274176.

The previous prime is 11303312093. The next prime is 11303312131. The reversal of 11303312121 is 12121330311.

It can be written as a sum of positive squares in 2 ways, for example, as 5049665721 + 6253646400 = 71061^2 + 79080^2 .

It is not a de Polignac number, because 11303312121 - 2⁷ = 11303311993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11303312094 and 11303312103.

It is not an unprimeable number, because it can be changed into a prime (11303312131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36938776 + ... + 36939081.

It is an arithmetic number, because the mean of its divisors is an integer number (1440618231).

Almost surely, 2^11303312121 is an apocalyptic number.

It is an amenable number.

11303312121 is a deficient number, since it is larger than the sum of its proper divisors (5984106651).

11303312121 is a wasteful number, since it uses less digits than its factorization.

11303312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73877880 (or 73877877 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11303312121 its reverse (12121330311), we get a palindrome (23424642432).

The spelling of 11303312121 in words is "eleven billion, three hundred three million, three hundred twelve thousand, one hundred twenty-one".