11123103121 has 8 divisors (see below), whose sum is σ = 11980569384. Its totient is φ = 10265900160.

The previous prime is 11123103119. The next prime is 11123103137. The reversal of 11123103121 is 12130132111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92852496 + 11030250625 = 9636^2 + 105025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11123103121 - 2¹ = 11123103119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123103095 and 11123103104.

It is not an unprimeable number, because it can be changed into a prime (11123103191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26751 + ... + 151531.

It is an arithmetic number, because the mean of its divisors is an integer number (1497571173).

Almost surely, 2^11123103121 is an apocalyptic number.

It is an amenable number.

11123103121 is a deficient number, since it is larger than the sum of its proper divisors (857466263).

11123103121 is a wasteful number, since it uses less digits than its factorization.

11123103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131651.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11123103121 its reverse (12130132111), we get a palindrome (23253235232).

It can be divided in two parts, 11123 and 103121, that added together give a square (114244 = 338²).

The spelling of 11123103121 in words is "eleven billion, one hundred twenty-three million, one hundred three thousand, one hundred twenty-one".