11110312121 has 4 divisors (see below), whose sum is σ = 11212241700. Its totient is φ = 11008382544.

The previous prime is 11110312091. The next prime is 11110312123. The reversal of 11110312121 is 12121301111.

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 9428410000 + 1681902121 = 97100^2 + 41011^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110312121 - 2¹⁰ = 11110311097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11110312096 and 11110312105.

It is not an unprimeable number, because it can be changed into a prime (11110312123) 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, 50964626 + ... + 50964843.

It is an arithmetic number, because the mean of its divisors is an integer number (2803060425).

Almost surely, 2^11110312121 is an apocalyptic number.

It is an amenable number.

11110312121 is a deficient number, since it is larger than the sum of its proper divisors (101929579).

11110312121 is a wasteful number, since it uses less digits than its factorization.

11110312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101929578.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11110312121 its reverse (12121301111), we get a palindrome (23231613232).

The spelling of 11110312121 in words is "eleven billion, one hundred ten million, three hundred twelve thousand, one hundred twenty-one".