11125131121 has 8 divisors (see below), whose sum is σ = 11985631784. Its totient is φ = 10265304960.

The previous prime is 11125131091. The next prime is 11125131133. The reversal of 11125131121 is 12113152111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8381025 + 11116750096 = 2895^2 + 105436^2 .

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 11125131121 - 2¹³ = 11125122929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11125131151) 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, 134100 + ... + 200581.

It is an arithmetic number, because the mean of its divisors is an integer number (1498203973).

Almost surely, 2^11125131121 is an apocalyptic number.

It is an amenable number.

11125131121 is a deficient number, since it is larger than the sum of its proper divisors (860500663).

11125131121 is a wasteful number, since it uses less digits than its factorization.

11125131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337251.

The product of its digits is 60, while the sum is 19.

Adding to 11125131121 its reverse (12113152111), we get a palindrome (23238283232).

The spelling of 11125131121 in words is "eleven billion, one hundred twenty-five million, one hundred thirty-one thousand, one hundred twenty-one".