11129121 has 12 divisors (see below), whose sum is σ = 16159572. Its totient is φ = 7380576.

The previous prime is 11129113. The next prime is 11129123. The reversal of 11129121 is 12192111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10890000 + 239121 = 3300^2 + 489^2 .

It is not a de Polignac number, because 11129121 - 2³ = 11129113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11129094 and 11129103.

It is not an unprimeable number, because it can be changed into a prime (11129123) 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, 1366 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (1346631).

Almost surely, 2^11129121 is an apocalyptic number.

It is an amenable number.

11129121 is a deficient number, since it is larger than the sum of its proper divisors (5030451).

11129121 is a wasteful number, since it uses less digits than its factorization.

11129121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480 (or 6477 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 11129121 is about 3336.0337228511. The cubic root of 11129121 is about 223.2648157427.

The spelling of 11129121 in words is "eleven million, one hundred twenty-nine thousand, one hundred twenty-one".