11123403231121 has 4 divisors (see below), whose sum is σ = 11123451224244. Its totient is φ = 11123355238000.

The previous prime is 11123403231067. The next prime is 11123403231131. The reversal of 11123403231121 is 12113230432111.

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 1459418628096 + 9663984603025 = 1208064^2 + 3108695^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123403231121 - 2²¹ = 11123401133969 is a prime.

It is a super-2 number, since 2×11123403231121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123403231131) 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, 23647210 + ... + 24113011.

It is an arithmetic number, because the mean of its divisors is an integer number (2780862806061).

Almost surely, 2^{11123403231121} is an apocalyptic number.

It is an amenable number.

11123403231121 is a deficient number, since it is larger than the sum of its proper divisors (47993123).

11123403231121 is an equidigital number, since it uses as much as digits as its factorization.

11123403231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47993122.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 11123403231121 its reverse (12113230432111), we get a palindrome (23236633663232).

The spelling of 11123403231121 in words is "eleven trillion, one hundred twenty-three billion, four hundred three million, two hundred thirty-one thousand, one hundred twenty-one".