11121131 has 4 divisors (see below), whose sum is σ = 12709872. Its totient is φ = 9532392.

The previous prime is 11121083. The next prime is 11121139. The reversal of 11121131 is 13112111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121131 - 2¹⁰ = 11120107 is a prime.

It is a super-2 number, since 2×11121131² = 247359109438322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11121139) 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, 794360 + ... + 794373.

It is an arithmetic number, because the mean of its divisors is an integer number (3177468).

Almost surely, 2^11121131 is an apocalyptic number.

11121131 is a deficient number, since it is larger than the sum of its proper divisors (1588741).

11121131 is an equidigital number, since it uses as much as digits as its factorization.

11121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588740.

The product of its digits is 6, while the sum is 11.

The square root of 11121131 is about 3334.8359779755. The cubic root of 11121131 is about 223.2113729790.

Adding to 11121131 its reverse (13112111), we get a palindrome (24233242).

The spelling of 11121131 in words is "eleven million, one hundred twenty-one thousand, one hundred thirty-one".